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[其他] 几个小题目

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  • TA的每日心情
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    2024-1-5 22:47
  • 签到天数: 1231 天

    [LV.10]大乘

    21#
    发表于 2015-3-24 22:29:34 | 只看该作者
    xlan1976 发表于 2015-3-24 08:03
    第一个没想;
    第二个是挪动3个吧;
    第三个应该是9,首先-25的次方尾数肯定是5,6的次方尾数肯定是6。正数和 ...

    这个说的对。我疏忽了。
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    [LV.10]大乘

    22#
    发表于 2015-3-24 22:30:17 | 只看该作者

    喜欢说的对,我疏忽了。
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    [LV.1]炼气

    23#
    发表于 2015-3-24 23:55:17 | 只看该作者
    本帖最后由 Highway 于 2015-3-25 00:03 编辑

    第四题:
    最小四位数:1204
    最大四位数:1758
    全部可能的四位数组合:128
    [1204, 1206, 1208, 1234, 1235, 1236, 1238, 1239, 1240, 1243, 1245, 1247, 1248, 1253, 1254, 1256, 1257, 1258, 1270, 1273, 1274, 1275, 1279, 1280, 1283, 1284, 1285, 1289, 1293, 1297, 1298, 1324, 1326, 1328, 1340, 1342, 1346, 1347, 1349, 1362, 1367, 1369, 1370, 1372, 1374, 1376, 1378, 1380, 1382, 1386, 1387, 1389, 1394, 1396, 1398, 1403, 1407, 1408, 1423, 1427, 1428, 1463, 1467, 1468, 1503, 1507, 1508, 1523, 1524, 1526, 1527, 1528, 1540, 1542, 1546, 1547, 1549, 1562, 1563, 1567, 1568, 1569, 1570, 1572, 1574, 1576, 1578, 1580, 1582, 1586, 1587, 1589, 1594, 1596, 1598, 1634, 1635, 1639, 1640, 1643, 1645, 1647, 1648, 1653, 1657, 1658, 1670, 1673, 1674, 1675, 1679, 1680, 1683, 1684, 1685, 1689, 1693, 1697, 1698, 1704, 1706, 1708, 1734, 1736, 1738, 1754, 1756, 1758]

    如果愿意动脑筋的话,可以把1998改成2015,那么答案会是什么样呢?

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  • TA的每日心情
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    11 小时前
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    [LV.Master]无

    24#
     楼主| 发表于 2015-3-25 02:22:22 | 只看该作者
    Highway 发表于 2015-3-24 10:55
    第四题:
    最小四位数:1204
    最大四位数:1758

    嗯?你这128个可能性都是符合题意的答案吗?
    比如,1204要加那些数得到1998呢?
    如果不是,你这128个可能性有什么特征呢?
  • TA的每日心情
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    [LV.Master]无

    25#
     楼主| 发表于 2015-3-25 02:24:00 | 只看该作者
    黑洞的颜色 发表于 2015-3-24 09:30
    喜欢说的对,我疏忽了。

    我也疏忽了,掉陷阱里了,还是个好陷阱。 汗~
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    [LV.1]炼气

    26#
    发表于 2015-3-25 08:41:23 | 只看该作者
    喜欢 发表于 2015-3-25 02:22
    嗯?你这128个可能性都是符合题意的答案吗?
    比如,1204要加那些数得到1998呢?
    如果不是,你这128个可能 ...

    当然了,我还能蒙人吗。

    不信你一个个试,假一罚十!
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    [LV.Master]无

    27#
     楼主| 发表于 2015-3-25 09:03:09 | 只看该作者
    Highway 发表于 2015-3-24 19:41
    当然了,我还能蒙人吗。

    不信你一个个试,假一罚十!

    哦,对。至少1204我能算出来了。
    那么,你这是用电脑程序穷举出来的吧?
    厉害!
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    [LV.1]炼气

    28#
    发表于 2015-3-25 10:01:49 | 只看该作者
    喜欢 发表于 2015-3-25 09:03
    哦,对。至少1204我能算出来了。
    那么,你这是用电脑程序穷举出来的吧?
    厉害! ...

    写了七八行的程序,算是作弊吧。这种事儿自己想个算法出来,具体操作就交给电脑去干吧,它一秒钟能运行好几亿次呢,闲着也是闲着。

    该用户从未签到

    29#
    发表于 2015-3-25 15:17:00 | 只看该作者
    喜欢 发表于 2015-3-25 02:22
    嗯?你这128个可能性都是符合题意的答案吗?
    比如,1204要加那些数得到1998呢?
    如果不是,你这128个可能 ...

    喜欢gg,咱不用电脑。因为这三个数的个位,十位,百位都可以互换,得出的答案都是满足题目要求的。所以确定个位,十位 (各有三个)和百位的组合,就能得出一共有多少种解了。我做题的纸找不着了,所以现在也不知道是不是有且仅有128组解,但我选择相信轧叔的电脑了。
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    [LV.1]炼气

    30#
    发表于 2015-3-26 05:05:36 | 只看该作者
    独角兽 发表于 2015-3-25 15:17
    喜欢gg,咱不用电脑。因为这三个数的个位,十位,百位都可以互换,得出的答案都是满足题目要求的。所以确 ...

      1 ==>  36 + 758 + 1204 = 1998
      2 ==>  38 + 756 + 1204 = 1998
      3 ==>  56 + 738 + 1204 = 1998
      4 ==>  58 + 736 + 1204 = 1998
      5 ==>  34 + 758 + 1206 = 1998
      6 ==>  38 + 754 + 1206 = 1998
      7 ==>  54 + 738 + 1206 = 1998
      8 ==>  58 + 734 + 1206 = 1998
      9 ==>  34 + 756 + 1208 = 1998
    10 ==>  36 + 754 + 1208 = 1998
    11 ==>  54 + 736 + 1208 = 1998
    12 ==>  56 + 734 + 1208 = 1998
    13 ==>  06 + 758 + 1234 = 1998
    14 ==>  08 + 756 + 1234 = 1998
    15 ==>  56 + 708 + 1234 = 1998
    16 ==>  58 + 706 + 1234 = 1998
    17 ==>  75 + 689 + 1234 = 1998
    18 ==>  79 + 685 + 1234 = 1998
    19 ==>  85 + 679 + 1234 = 1998
    20 ==>  89 + 675 + 1234 = 1998
    21 ==>  74 + 689 + 1235 = 1998
    22 ==>  79 + 684 + 1235 = 1998
    23 ==>  84 + 679 + 1235 = 1998
    24 ==>  89 + 674 + 1235 = 1998
    25 ==>  04 + 758 + 1236 = 1998
    26 ==>  08 + 754 + 1236 = 1998
    27 ==>  54 + 708 + 1236 = 1998
    28 ==>  58 + 704 + 1236 = 1998
    29 ==>  04 + 756 + 1238 = 1998
    30 ==>  06 + 754 + 1238 = 1998
    31 ==>  54 + 706 + 1238 = 1998
    32 ==>  56 + 704 + 1238 = 1998
    33 ==>  74 + 685 + 1239 = 1998
    34 ==>  75 + 684 + 1239 = 1998
    35 ==>  84 + 675 + 1239 = 1998
    36 ==>  85 + 674 + 1239 = 1998
    37 ==>  73 + 685 + 1240 = 1998
    38 ==>  75 + 683 + 1240 = 1998
    39 ==>  83 + 675 + 1240 = 1998
    40 ==>  85 + 673 + 1240 = 1998
    41 ==>  57 + 698 + 1243 = 1998
    42 ==>  58 + 697 + 1243 = 1998
    43 ==>  70 + 685 + 1243 = 1998
    44 ==>  75 + 680 + 1243 = 1998
    45 ==>  80 + 675 + 1243 = 1998
    46 ==>  85 + 670 + 1243 = 1998
    47 ==>  97 + 658 + 1243 = 1998
    48 ==>  98 + 657 + 1243 = 1998
    49 ==>  70 + 683 + 1245 = 1998
    50 ==>  73 + 680 + 1245 = 1998
    51 ==>  80 + 673 + 1245 = 1998
    52 ==>  83 + 670 + 1245 = 1998
    53 ==>  53 + 698 + 1247 = 1998
    54 ==>  58 + 693 + 1247 = 1998
    55 ==>  93 + 658 + 1247 = 1998
    56 ==>  98 + 653 + 1247 = 1998
    57 ==>  53 + 697 + 1248 = 1998
    58 ==>  57 + 693 + 1248 = 1998
    59 ==>  93 + 657 + 1248 = 1998
    60 ==>  97 + 653 + 1248 = 1998
    61 ==>  47 + 698 + 1253 = 1998
    62 ==>  48 + 697 + 1253 = 1998
    63 ==>  97 + 648 + 1253 = 1998
    64 ==>  98 + 647 + 1253 = 1998
    65 ==>  06 + 738 + 1254 = 1998
    66 ==>  08 + 736 + 1254 = 1998
    67 ==>  36 + 708 + 1254 = 1998
    68 ==>  38 + 706 + 1254 = 1998
    69 ==>  04 + 738 + 1256 = 1998
    70 ==>  08 + 734 + 1256 = 1998
    71 ==>  34 + 708 + 1256 = 1998
    72 ==>  38 + 704 + 1256 = 1998
    73 ==>  43 + 698 + 1257 = 1998
    74 ==>  48 + 693 + 1257 = 1998
    75 ==>  93 + 648 + 1257 = 1998
    76 ==>  98 + 643 + 1257 = 1998
    77 ==>  04 + 736 + 1258 = 1998
    78 ==>  06 + 734 + 1258 = 1998
    79 ==>  34 + 706 + 1258 = 1998
    80 ==>  36 + 704 + 1258 = 1998
    81 ==>  43 + 697 + 1258 = 1998
    82 ==>  47 + 693 + 1258 = 1998
    83 ==>  93 + 647 + 1258 = 1998
    84 ==>  97 + 643 + 1258 = 1998
    85 ==>  43 + 685 + 1270 = 1998
    86 ==>  45 + 683 + 1270 = 1998
    87 ==>  83 + 645 + 1270 = 1998
    88 ==>  85 + 643 + 1270 = 1998
    89 ==>  40 + 685 + 1273 = 1998
    90 ==>  45 + 680 + 1273 = 1998
    91 ==>  80 + 645 + 1273 = 1998
    92 ==>  85 + 640 + 1273 = 1998
    93 ==>  35 + 689 + 1274 = 1998
    94 ==>  39 + 685 + 1274 = 1998
    95 ==>  85 + 639 + 1274 = 1998
    96 ==>  89 + 635 + 1274 = 1998
    97 ==>  34 + 689 + 1275 = 1998
    98 ==>  39 + 684 + 1275 = 1998
    99 ==>  40 + 683 + 1275 = 1998
    100 ==>  43 + 680 + 1275 = 1998
    101 ==>  80 + 643 + 1275 = 1998
    102 ==>  83 + 640 + 1275 = 1998
    103 ==>  84 + 639 + 1275 = 1998
    104 ==>  89 + 634 + 1275 = 1998
    105 ==>  34 + 685 + 1279 = 1998
    106 ==>  35 + 684 + 1279 = 1998
    107 ==>  84 + 635 + 1279 = 1998
    108 ==>  85 + 634 + 1279 = 1998
    109 ==>  43 + 675 + 1280 = 1998
    110 ==>  45 + 673 + 1280 = 1998
    111 ==>  73 + 645 + 1280 = 1998
    112 ==>  75 + 643 + 1280 = 1998
    113 ==>  40 + 675 + 1283 = 1998
    114 ==>  45 + 670 + 1283 = 1998
    115 ==>  70 + 645 + 1283 = 1998
    116 ==>  75 + 640 + 1283 = 1998
    117 ==>  35 + 679 + 1284 = 1998
    118 ==>  39 + 675 + 1284 = 1998
    119 ==>  75 + 639 + 1284 = 1998
    120 ==>  79 + 635 + 1284 = 1998
    121 ==>  34 + 679 + 1285 = 1998
    122 ==>  39 + 674 + 1285 = 1998
    123 ==>  40 + 673 + 1285 = 1998
    124 ==>  43 + 670 + 1285 = 1998
    125 ==>  70 + 643 + 1285 = 1998
    126 ==>  73 + 640 + 1285 = 1998
    127 ==>  74 + 639 + 1285 = 1998
    128 ==>  79 + 634 + 1285 = 1998
    129 ==>  34 + 675 + 1289 = 1998
    130 ==>  35 + 674 + 1289 = 1998
    131 ==>  74 + 635 + 1289 = 1998
    132 ==>  75 + 634 + 1289 = 1998
    133 ==>  47 + 658 + 1293 = 1998
    134 ==>  48 + 657 + 1293 = 1998
    135 ==>  57 + 648 + 1293 = 1998
    136 ==>  58 + 647 + 1293 = 1998
    137 ==>  43 + 658 + 1297 = 1998
    138 ==>  48 + 653 + 1297 = 1998
    139 ==>  53 + 648 + 1297 = 1998
    140 ==>  58 + 643 + 1297 = 1998
    141 ==>  43 + 657 + 1298 = 1998
    142 ==>  47 + 653 + 1298 = 1998
    143 ==>  53 + 647 + 1298 = 1998
    144 ==>  57 + 643 + 1298 = 1998
    145 ==>  76 + 598 + 1324 = 1998
    146 ==>  78 + 596 + 1324 = 1998
    147 ==>  96 + 578 + 1324 = 1998
    148 ==>  98 + 576 + 1324 = 1998
    149 ==>  74 + 598 + 1326 = 1998
    150 ==>  78 + 594 + 1326 = 1998
    151 ==>  94 + 578 + 1326 = 1998
    152 ==>  98 + 574 + 1326 = 1998
    153 ==>  74 + 596 + 1328 = 1998
    154 ==>  76 + 594 + 1328 = 1998
    155 ==>  94 + 576 + 1328 = 1998
    156 ==>  96 + 574 + 1328 = 1998
    157 ==>  72 + 586 + 1340 = 1998
    158 ==>  76 + 582 + 1340 = 1998
    159 ==>  82 + 576 + 1340 = 1998
    160 ==>  86 + 572 + 1340 = 1998
    161 ==>  67 + 589 + 1342 = 1998
    162 ==>  69 + 587 + 1342 = 1998
    163 ==>  70 + 586 + 1342 = 1998
    164 ==>  76 + 580 + 1342 = 1998
    165 ==>  80 + 576 + 1342 = 1998
    166 ==>  86 + 570 + 1342 = 1998
    167 ==>  87 + 569 + 1342 = 1998
    168 ==>  89 + 567 + 1342 = 1998
    169 ==>  70 + 582 + 1346 = 1998
    170 ==>  72 + 580 + 1346 = 1998
    171 ==>  80 + 572 + 1346 = 1998
    172 ==>  82 + 570 + 1346 = 1998
    173 ==>  62 + 589 + 1347 = 1998
    174 ==>  69 + 582 + 1347 = 1998
    175 ==>  82 + 569 + 1347 = 1998
    176 ==>  89 + 562 + 1347 = 1998
    177 ==>  62 + 587 + 1349 = 1998
    178 ==>  67 + 582 + 1349 = 1998
    179 ==>  82 + 567 + 1349 = 1998
    180 ==>  87 + 562 + 1349 = 1998
    181 ==>  47 + 589 + 1362 = 1998
    182 ==>  49 + 587 + 1362 = 1998
    183 ==>  87 + 549 + 1362 = 1998
    184 ==>  89 + 547 + 1362 = 1998
    185 ==>  42 + 589 + 1367 = 1998
    186 ==>  49 + 582 + 1367 = 1998
    187 ==>  82 + 549 + 1367 = 1998
    188 ==>  89 + 542 + 1367 = 1998
    189 ==>  42 + 587 + 1369 = 1998
    190 ==>  47 + 582 + 1369 = 1998
    191 ==>  82 + 547 + 1369 = 1998
    192 ==>  87 + 542 + 1369 = 1998
    193 ==>  42 + 586 + 1370 = 1998
    194 ==>  46 + 582 + 1370 = 1998
    195 ==>  82 + 546 + 1370 = 1998
    196 ==>  86 + 542 + 1370 = 1998
    197 ==>  40 + 586 + 1372 = 1998
    198 ==>  46 + 580 + 1372 = 1998
    199 ==>  80 + 546 + 1372 = 1998
    200 ==>  86 + 540 + 1372 = 1998
    201 ==>  26 + 598 + 1374 = 1998
    202 ==>  28 + 596 + 1374 = 1998
    203 ==>  96 + 528 + 1374 = 1998
    204 ==>  98 + 526 + 1374 = 1998
    205 ==>  24 + 598 + 1376 = 1998
    206 ==>  28 + 594 + 1376 = 1998
    207 ==>  40 + 582 + 1376 = 1998
    208 ==>  42 + 580 + 1376 = 1998
    209 ==>  80 + 542 + 1376 = 1998
    210 ==>  82 + 540 + 1376 = 1998
    211 ==>  94 + 528 + 1376 = 1998
    212 ==>  98 + 524 + 1376 = 1998
    213 ==>  24 + 596 + 1378 = 1998
    214 ==>  26 + 594 + 1378 = 1998
    215 ==>  94 + 526 + 1378 = 1998
    216 ==>  96 + 524 + 1378 = 1998
    217 ==>  42 + 576 + 1380 = 1998
    218 ==>  46 + 572 + 1380 = 1998
    219 ==>  72 + 546 + 1380 = 1998
    220 ==>  76 + 542 + 1380 = 1998
    221 ==>  40 + 576 + 1382 = 1998
    222 ==>  46 + 570 + 1382 = 1998
    223 ==>  47 + 569 + 1382 = 1998
    224 ==>  49 + 567 + 1382 = 1998
    225 ==>  67 + 549 + 1382 = 1998
    226 ==>  69 + 547 + 1382 = 1998
    227 ==>  70 + 546 + 1382 = 1998
    228 ==>  76 + 540 + 1382 = 1998
    229 ==>  40 + 572 + 1386 = 1998
    230 ==>  42 + 570 + 1386 = 1998
    231 ==>  70 + 542 + 1386 = 1998
    232 ==>  72 + 540 + 1386 = 1998
    233 ==>  42 + 569 + 1387 = 1998
    234 ==>  49 + 562 + 1387 = 1998
    235 ==>  62 + 549 + 1387 = 1998
    236 ==>  69 + 542 + 1387 = 1998
    237 ==>  42 + 567 + 1389 = 1998
    238 ==>  47 + 562 + 1389 = 1998
    239 ==>  62 + 547 + 1389 = 1998
    240 ==>  67 + 542 + 1389 = 1998
    241 ==>  26 + 578 + 1394 = 1998
    242 ==>  28 + 576 + 1394 = 1998
    243 ==>  76 + 528 + 1394 = 1998
    244 ==>  78 + 526 + 1394 = 1998
    245 ==>  24 + 578 + 1396 = 1998
    246 ==>  28 + 574 + 1396 = 1998
    247 ==>  74 + 528 + 1396 = 1998
    248 ==>  78 + 524 + 1396 = 1998
    249 ==>  24 + 576 + 1398 = 1998
    250 ==>  26 + 574 + 1398 = 1998
    251 ==>  74 + 526 + 1398 = 1998
    252 ==>  76 + 524 + 1398 = 1998
    253 ==>  27 + 568 + 1403 = 1998
    254 ==>  28 + 567 + 1403 = 1998
    255 ==>  67 + 528 + 1403 = 1998
    256 ==>  68 + 527 + 1403 = 1998
    257 ==>  23 + 568 + 1407 = 1998
    258 ==>  28 + 563 + 1407 = 1998
    259 ==>  63 + 528 + 1407 = 1998
    260 ==>  68 + 523 + 1407 = 1998
    261 ==>  23 + 567 + 1408 = 1998
    262 ==>  27 + 563 + 1408 = 1998
    263 ==>  63 + 527 + 1408 = 1998
    264 ==>  67 + 523 + 1408 = 1998
    265 ==>  07 + 568 + 1423 = 1998
    266 ==>  08 + 567 + 1423 = 1998
    267 ==>  67 + 508 + 1423 = 1998
    268 ==>  68 + 507 + 1423 = 1998
    269 ==>  03 + 568 + 1427 = 1998
    270 ==>  08 + 563 + 1427 = 1998
    271 ==>  63 + 508 + 1427 = 1998
    272 ==>  68 + 503 + 1427 = 1998
    273 ==>  03 + 567 + 1428 = 1998
    274 ==>  07 + 563 + 1428 = 1998
    275 ==>  63 + 507 + 1428 = 1998
    276 ==>  67 + 503 + 1428 = 1998
    277 ==>  07 + 528 + 1463 = 1998
    278 ==>  08 + 527 + 1463 = 1998
    279 ==>  27 + 508 + 1463 = 1998
    280 ==>  28 + 507 + 1463 = 1998
    281 ==>  03 + 528 + 1467 = 1998
    282 ==>  08 + 523 + 1467 = 1998
    283 ==>  23 + 508 + 1467 = 1998
    284 ==>  28 + 503 + 1467 = 1998
    285 ==>  03 + 527 + 1468 = 1998
    286 ==>  07 + 523 + 1468 = 1998
    287 ==>  23 + 507 + 1468 = 1998
    288 ==>  27 + 503 + 1468 = 1998
    289 ==>  27 + 468 + 1503 = 1998
    290 ==>  28 + 467 + 1503 = 1998
    291 ==>  67 + 428 + 1503 = 1998
    292 ==>  68 + 427 + 1503 = 1998
    293 ==>  23 + 468 + 1507 = 1998
    294 ==>  28 + 463 + 1507 = 1998
    295 ==>  63 + 428 + 1507 = 1998
    296 ==>  68 + 423 + 1507 = 1998
    297 ==>  23 + 467 + 1508 = 1998
    298 ==>  27 + 463 + 1508 = 1998
    299 ==>  63 + 427 + 1508 = 1998
    300 ==>  67 + 423 + 1508 = 1998
    301 ==>  07 + 468 + 1523 = 1998
    302 ==>  08 + 467 + 1523 = 1998
    303 ==>  67 + 408 + 1523 = 1998
    304 ==>  68 + 407 + 1523 = 1998
    305 ==>  76 + 398 + 1524 = 1998
    306 ==>  78 + 396 + 1524 = 1998
    307 ==>  96 + 378 + 1524 = 1998
    308 ==>  98 + 376 + 1524 = 1998
    309 ==>  74 + 398 + 1526 = 1998
    310 ==>  78 + 394 + 1526 = 1998
    311 ==>  94 + 378 + 1526 = 1998
    312 ==>  98 + 374 + 1526 = 1998
    313 ==>  03 + 468 + 1527 = 1998
    314 ==>  08 + 463 + 1527 = 1998
    315 ==>  63 + 408 + 1527 = 1998
    316 ==>  68 + 403 + 1527 = 1998
    317 ==>  03 + 467 + 1528 = 1998
    318 ==>  07 + 463 + 1528 = 1998
    319 ==>  63 + 407 + 1528 = 1998
    320 ==>  67 + 403 + 1528 = 1998
    321 ==>  74 + 396 + 1528 = 1998
    322 ==>  76 + 394 + 1528 = 1998
    323 ==>  94 + 376 + 1528 = 1998
    324 ==>  96 + 374 + 1528 = 1998
    325 ==>  72 + 386 + 1540 = 1998
    326 ==>  76 + 382 + 1540 = 1998
    327 ==>  82 + 376 + 1540 = 1998
    328 ==>  86 + 372 + 1540 = 1998
    329 ==>  67 + 389 + 1542 = 1998
    330 ==>  69 + 387 + 1542 = 1998
    331 ==>  70 + 386 + 1542 = 1998
    332 ==>  76 + 380 + 1542 = 1998
    333 ==>  80 + 376 + 1542 = 1998
    334 ==>  86 + 370 + 1542 = 1998
    335 ==>  87 + 369 + 1542 = 1998
    336 ==>  89 + 367 + 1542 = 1998
    337 ==>  70 + 382 + 1546 = 1998
    338 ==>  72 + 380 + 1546 = 1998
    339 ==>  80 + 372 + 1546 = 1998
    340 ==>  82 + 370 + 1546 = 1998
    341 ==>  62 + 389 + 1547 = 1998
    342 ==>  69 + 382 + 1547 = 1998
    343 ==>  82 + 369 + 1547 = 1998
    344 ==>  89 + 362 + 1547 = 1998
    345 ==>  62 + 387 + 1549 = 1998
    346 ==>  67 + 382 + 1549 = 1998
    347 ==>  82 + 367 + 1549 = 1998
    348 ==>  87 + 362 + 1549 = 1998
    349 ==>  47 + 389 + 1562 = 1998
    350 ==>  49 + 387 + 1562 = 1998
    351 ==>  87 + 349 + 1562 = 1998
    352 ==>  89 + 347 + 1562 = 1998
    353 ==>  07 + 428 + 1563 = 1998
    354 ==>  08 + 427 + 1563 = 1998
    355 ==>  27 + 408 + 1563 = 1998
    356 ==>  28 + 407 + 1563 = 1998
    357 ==>  03 + 428 + 1567 = 1998
    358 ==>  08 + 423 + 1567 = 1998
    359 ==>  23 + 408 + 1567 = 1998
    360 ==>  28 + 403 + 1567 = 1998
    361 ==>  42 + 389 + 1567 = 1998
    362 ==>  49 + 382 + 1567 = 1998
    363 ==>  82 + 349 + 1567 = 1998
    364 ==>  89 + 342 + 1567 = 1998
    365 ==>  03 + 427 + 1568 = 1998
    366 ==>  07 + 423 + 1568 = 1998
    367 ==>  23 + 407 + 1568 = 1998
    368 ==>  27 + 403 + 1568 = 1998
    369 ==>  42 + 387 + 1569 = 1998
    370 ==>  47 + 382 + 1569 = 1998
    371 ==>  82 + 347 + 1569 = 1998
    372 ==>  87 + 342 + 1569 = 1998
    373 ==>  42 + 386 + 1570 = 1998
    374 ==>  46 + 382 + 1570 = 1998
    375 ==>  82 + 346 + 1570 = 1998
    376 ==>  86 + 342 + 1570 = 1998
    377 ==>  40 + 386 + 1572 = 1998
    378 ==>  46 + 380 + 1572 = 1998
    379 ==>  80 + 346 + 1572 = 1998
    380 ==>  86 + 340 + 1572 = 1998
    381 ==>  26 + 398 + 1574 = 1998
    382 ==>  28 + 396 + 1574 = 1998
    383 ==>  96 + 328 + 1574 = 1998
    384 ==>  98 + 326 + 1574 = 1998
    385 ==>  24 + 398 + 1576 = 1998
    386 ==>  28 + 394 + 1576 = 1998
    387 ==>  40 + 382 + 1576 = 1998
    388 ==>  42 + 380 + 1576 = 1998
    389 ==>  80 + 342 + 1576 = 1998
    390 ==>  82 + 340 + 1576 = 1998
    391 ==>  94 + 328 + 1576 = 1998
    392 ==>  98 + 324 + 1576 = 1998
    393 ==>  24 + 396 + 1578 = 1998
    394 ==>  26 + 394 + 1578 = 1998
    395 ==>  94 + 326 + 1578 = 1998
    396 ==>  96 + 324 + 1578 = 1998
    397 ==>  42 + 376 + 1580 = 1998
    398 ==>  46 + 372 + 1580 = 1998
    399 ==>  72 + 346 + 1580 = 1998
    400 ==>  76 + 342 + 1580 = 1998
    401 ==>  40 + 376 + 1582 = 1998
    402 ==>  46 + 370 + 1582 = 1998
    403 ==>  47 + 369 + 1582 = 1998
    404 ==>  49 + 367 + 1582 = 1998
    405 ==>  67 + 349 + 1582 = 1998
    406 ==>  69 + 347 + 1582 = 1998
    407 ==>  70 + 346 + 1582 = 1998
    408 ==>  76 + 340 + 1582 = 1998
    409 ==>  40 + 372 + 1586 = 1998
    410 ==>  42 + 370 + 1586 = 1998
    411 ==>  70 + 342 + 1586 = 1998
    412 ==>  72 + 340 + 1586 = 1998
    413 ==>  42 + 369 + 1587 = 1998
    414 ==>  49 + 362 + 1587 = 1998
    415 ==>  62 + 349 + 1587 = 1998
    416 ==>  69 + 342 + 1587 = 1998
    417 ==>  42 + 367 + 1589 = 1998
    418 ==>  47 + 362 + 1589 = 1998
    419 ==>  62 + 347 + 1589 = 1998
    420 ==>  67 + 342 + 1589 = 1998
    421 ==>  26 + 378 + 1594 = 1998
    422 ==>  28 + 376 + 1594 = 1998
    423 ==>  76 + 328 + 1594 = 1998
    424 ==>  78 + 326 + 1594 = 1998
    425 ==>  24 + 378 + 1596 = 1998
    426 ==>  28 + 374 + 1596 = 1998
    427 ==>  74 + 328 + 1596 = 1998
    428 ==>  78 + 324 + 1596 = 1998
    429 ==>  24 + 376 + 1598 = 1998
    430 ==>  26 + 374 + 1598 = 1998
    431 ==>  74 + 326 + 1598 = 1998
    432 ==>  76 + 324 + 1598 = 1998
    433 ==>  75 + 289 + 1634 = 1998
    434 ==>  79 + 285 + 1634 = 1998
    435 ==>  85 + 279 + 1634 = 1998
    436 ==>  89 + 275 + 1634 = 1998
    437 ==>  74 + 289 + 1635 = 1998
    438 ==>  79 + 284 + 1635 = 1998
    439 ==>  84 + 279 + 1635 = 1998
    440 ==>  89 + 274 + 1635 = 1998
    441 ==>  74 + 285 + 1639 = 1998
    442 ==>  75 + 284 + 1639 = 1998
    443 ==>  84 + 275 + 1639 = 1998
    444 ==>  85 + 274 + 1639 = 1998
    445 ==>  73 + 285 + 1640 = 1998
    446 ==>  75 + 283 + 1640 = 1998
    447 ==>  83 + 275 + 1640 = 1998
    448 ==>  85 + 273 + 1640 = 1998
    449 ==>  57 + 298 + 1643 = 1998
    450 ==>  58 + 297 + 1643 = 1998
    451 ==>  70 + 285 + 1643 = 1998
    452 ==>  75 + 280 + 1643 = 1998
    453 ==>  80 + 275 + 1643 = 1998
    454 ==>  85 + 270 + 1643 = 1998
    455 ==>  97 + 258 + 1643 = 1998
    456 ==>  98 + 257 + 1643 = 1998
    457 ==>  70 + 283 + 1645 = 1998
    458 ==>  73 + 280 + 1645 = 1998
    459 ==>  80 + 273 + 1645 = 1998
    460 ==>  83 + 270 + 1645 = 1998
    461 ==>  53 + 298 + 1647 = 1998
    462 ==>  58 + 293 + 1647 = 1998
    463 ==>  93 + 258 + 1647 = 1998
    464 ==>  98 + 253 + 1647 = 1998
    465 ==>  53 + 297 + 1648 = 1998
    466 ==>  57 + 293 + 1648 = 1998
    467 ==>  93 + 257 + 1648 = 1998
    468 ==>  97 + 253 + 1648 = 1998
    469 ==>  47 + 298 + 1653 = 1998
    470 ==>  48 + 297 + 1653 = 1998
    471 ==>  97 + 248 + 1653 = 1998
    472 ==>  98 + 247 + 1653 = 1998
    473 ==>  43 + 298 + 1657 = 1998
    474 ==>  48 + 293 + 1657 = 1998
    475 ==>  93 + 248 + 1657 = 1998
    476 ==>  98 + 243 + 1657 = 1998
    477 ==>  43 + 297 + 1658 = 1998
    478 ==>  47 + 293 + 1658 = 1998
    479 ==>  93 + 247 + 1658 = 1998
    480 ==>  97 + 243 + 1658 = 1998
    481 ==>  43 + 285 + 1670 = 1998
    482 ==>  45 + 283 + 1670 = 1998
    483 ==>  83 + 245 + 1670 = 1998
    484 ==>  85 + 243 + 1670 = 1998
    485 ==>  40 + 285 + 1673 = 1998
    486 ==>  45 + 280 + 1673 = 1998
    487 ==>  80 + 245 + 1673 = 1998
    488 ==>  85 + 240 + 1673 = 1998
    489 ==>  35 + 289 + 1674 = 1998
    490 ==>  39 + 285 + 1674 = 1998
    491 ==>  85 + 239 + 1674 = 1998
    492 ==>  89 + 235 + 1674 = 1998
    493 ==>  34 + 289 + 1675 = 1998
    494 ==>  39 + 284 + 1675 = 1998
    495 ==>  40 + 283 + 1675 = 1998
    496 ==>  43 + 280 + 1675 = 1998
    497 ==>  80 + 243 + 1675 = 1998
    498 ==>  83 + 240 + 1675 = 1998
    499 ==>  84 + 239 + 1675 = 1998
    500 ==>  89 + 234 + 1675 = 1998
    501 ==>  34 + 285 + 1679 = 1998
    502 ==>  35 + 284 + 1679 = 1998
    503 ==>  84 + 235 + 1679 = 1998
    504 ==>  85 + 234 + 1679 = 1998
    505 ==>  43 + 275 + 1680 = 1998
    506 ==>  45 + 273 + 1680 = 1998
    507 ==>  73 + 245 + 1680 = 1998
    508 ==>  75 + 243 + 1680 = 1998
    509 ==>  40 + 275 + 1683 = 1998
    510 ==>  45 + 270 + 1683 = 1998
    511 ==>  70 + 245 + 1683 = 1998
    512 ==>  75 + 240 + 1683 = 1998
    513 ==>  35 + 279 + 1684 = 1998
    514 ==>  39 + 275 + 1684 = 1998
    515 ==>  75 + 239 + 1684 = 1998
    516 ==>  79 + 235 + 1684 = 1998
    517 ==>  34 + 279 + 1685 = 1998
    518 ==>  39 + 274 + 1685 = 1998
    519 ==>  40 + 273 + 1685 = 1998
    520 ==>  43 + 270 + 1685 = 1998
    521 ==>  70 + 243 + 1685 = 1998
    522 ==>  73 + 240 + 1685 = 1998
    523 ==>  74 + 239 + 1685 = 1998
    524 ==>  79 + 234 + 1685 = 1998
    525 ==>  34 + 275 + 1689 = 1998
    526 ==>  35 + 274 + 1689 = 1998
    527 ==>  74 + 235 + 1689 = 1998
    528 ==>  75 + 234 + 1689 = 1998
    529 ==>  47 + 258 + 1693 = 1998
    530 ==>  48 + 257 + 1693 = 1998
    531 ==>  57 + 248 + 1693 = 1998
    532 ==>  58 + 247 + 1693 = 1998
    533 ==>  43 + 258 + 1697 = 1998
    534 ==>  48 + 253 + 1697 = 1998
    535 ==>  53 + 248 + 1697 = 1998
    536 ==>  58 + 243 + 1697 = 1998
    537 ==>  43 + 257 + 1698 = 1998
    538 ==>  47 + 253 + 1698 = 1998
    539 ==>  53 + 247 + 1698 = 1998
    540 ==>  57 + 243 + 1698 = 1998
    541 ==>  36 + 258 + 1704 = 1998
    542 ==>  38 + 256 + 1704 = 1998
    543 ==>  56 + 238 + 1704 = 1998
    544 ==>  58 + 236 + 1704 = 1998
    545 ==>  34 + 258 + 1706 = 1998
    546 ==>  38 + 254 + 1706 = 1998
    547 ==>  54 + 238 + 1706 = 1998
    548 ==>  58 + 234 + 1706 = 1998
    549 ==>  34 + 256 + 1708 = 1998
    550 ==>  36 + 254 + 1708 = 1998
    551 ==>  54 + 236 + 1708 = 1998
    552 ==>  56 + 234 + 1708 = 1998
    553 ==>  06 + 258 + 1734 = 1998
    554 ==>  08 + 256 + 1734 = 1998
    555 ==>  56 + 208 + 1734 = 1998
    556 ==>  58 + 206 + 1734 = 1998
    557 ==>  04 + 258 + 1736 = 1998
    558 ==>  08 + 254 + 1736 = 1998
    559 ==>  54 + 208 + 1736 = 1998
    560 ==>  58 + 204 + 1736 = 1998
    561 ==>  04 + 256 + 1738 = 1998
    562 ==>  06 + 254 + 1738 = 1998
    563 ==>  54 + 206 + 1738 = 1998
    564 ==>  56 + 204 + 1738 = 1998
    565 ==>  06 + 238 + 1754 = 1998
    566 ==>  08 + 236 + 1754 = 1998
    567 ==>  36 + 208 + 1754 = 1998
    568 ==>  38 + 206 + 1754 = 1998
    569 ==>  04 + 238 + 1756 = 1998
    570 ==>  08 + 234 + 1756 = 1998
    571 ==>  34 + 208 + 1756 = 1998
    572 ==>  38 + 204 + 1756 = 1998
    573 ==>  04 + 236 + 1758 = 1998
    574 ==>  06 + 234 + 1758 = 1998
    575 ==>  34 + 206 + 1758 = 1998
    576 ==>  36 + 204 + 1758 = 1998

    总共是576个答案,但是最后一个四位数字只有128种。

    该用户从未签到

    31#
    发表于 2015-3-26 05:57:28 | 只看该作者
    Highway 发表于 2015-3-26 05:05
    1 ==>  36 + 758 + 1204 = 1998
      2 ==>  38 + 756 + 1204 = 1998
      3 ==>  56 + 738 + 1204 = 1998

    怎么这么多?实际上我昨天晚上回完贴后精神来了。自己又搞了一遍。结果算得144组解,其中四位数128种跟轧叔是一样的。可是144和576也差太多了。。。。
    就算04这种不算,也还是对不上呀,不开心。。。

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