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From Greg:
show that there is no five-digit number which uses each of the digits 1,2,3,4,5 such that the numbers formed
by the first digit is divisible by 1,
by the first two digits is divisible by 2
by the first three digits is divisible by 3,
by the first four digits is divisible by 4,
by the first five digits is divisible by 5
Answered by Stephen La Rocque, Claude Tradif and Victoria West. |
