Answer:
81 and 100
Explanation:
9 x 9 = 81
and...
10 x 10 = 100!
The others doesn't match the rules stated-
3 x 8 = 24, 2 x 12 = 24, 4 x 6 = 24, but no number that are the same multiply together to equal 24(that's also an integer)
All the others are the same way-
Hope this helps!