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hardest math question I've encountered

label Mathematics
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Jan 7th, 2015

there can be these many possibilities : 219

1001, 1010, 1100, 2002, 2011, 2020, 2101, 2110, 2200, 3003, 3012, 3021, 3030, 3102, 3111, 3120, 3201, 3210, 3300, 4004, 4013, 4022, 4031, 4040, 4103, 4112, 4121, 4130, 4202, 4211, 4220, 4301, 4310, 4400, 5005, 5014, 5023, 5032, 5041, 5050, 5104, 5113, 5122, 5131, 5140, 5203, 5212, 5221, 5230, 5302, 5311, 5320, 5401, 5410, 5500, 6006, 6015, 6024, 6033, 6042, 6051, 6060, 6105, 6114, 6123, 6132, 6141, 6150, 6204, 6213, 6222, 6231, 6240, 6303, 6312, 6321, 6330, 6402, 6411, 6420, 6501, 6510, 6600, 7007, 7016, 7025, 7034, 7043, 7052, 7061, 7070, 7106, 7115, 7124, 7133, 7142, 7151, 7160, 7205, 7214, 7223, 7232, 7241, 7250, 7304, 7313, 7322, 7331, 7340, 7403, 7412, 7421, 7430, 7502, 7511, 7520, 7601, 7610, 7700, 8008, 8017, 8026, 8035, 8044, 8053, 8062, 8071, 8080, 8107, 8116, 8125, 8134, 8143, 8152, 8161, 8170, 8206, 8215, 8224, 8233, 8242, 8251, 8260, 8305, 8314, 8323, 8332, 8341, 8350, 8404, 8413, 8422, 8431, 8440, 8503, 8512, 8521, 8530, 8602, 8611, 8620, 8701, 8710, 8800, 9009, 9018, 9027, 9036, 9045, 9054, 9063, 9072, 9081, 9090, 9108, 9117, 9126, 9135, 9144, 9153, 9162, 9171, 9180, 9207, 9216, 9225, 9234, 9243, 9252, 9261, 9270, 9306, 9315, 9324, 9333, 9342, 9351, 9360, 9405, 9414, 9423, 9432, 9441, 9450, 9504, 9513, 9522, 9531, 9540, 9603, 9612, 9621, 9630, 9702, 9711, 9720, 9801, 9810, 9900

Jan 7th, 2015

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Jan 7th, 2015
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Jan 7th, 2015
Jun 27th, 2017
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