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.

0 votes

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

...