18
64 is a two digit multiple of 8 (8x8) and if you add 6 and 4 together you get 10
18
No. There's no two digit numbers that could do this. The largest two digit number is 99. If you add 99 to itself, you only get 198, which is much smaller than a four digit number.
-3
84
27
The number is 85.
18
33 is a two-digit number whose digits add up to 6. 60, 51, 42, 24, 15
Two-digit prime numbers whose digits add up to 10 are:193773
67
15
23 or 41
12 and 72 24 and 36
it is 23 because 2+3 = 5
Divide the two-digit number by the one-digit number. If the remainder is zero then the 2-digit number is a multiple and if not, it is not.
The only positive two-digit multiple of 12 and 10 is 60.
No two digit prime number exists that is a multiple of 7. All two digit numbers that are multiples of 7 are compositenumbers.