Using all digits from 1 to 6 once only, make three two-digit numbers which multiplied together give the smallest number?

Question

There are four solutions.

Answer 1

Possible digits:
12 13 14 15 16
21 23 24 25 26
31 32 34 35 36
41 42 43 45 46
51 52 53 54 56
61 62 63 64 65

12600 is the lowest product & 14, 25 & 36 are the numbers.