8 and 248 * 24 = 1928 + 24 = 32
The sum of a single number is itself. So the only number whose sum equals 2 is 2.
25 and 18 are a factor pair of 450 whose sum is 43.
If the sum of the digits of a given number equals nine or a multiple of nine, nine is a factor of that number.
Distributive.
The sum of 64 and 192 is 256.
15 and 2
-4
There are 3 whose sum is 45 whose sum is 57 whose sum is 69 whose sum is 711 whose sum is 813 whose sum is 915 whose sum is 1017 whose sum is 1119 whose sum is 1219 whose sum is 1317 whose sum is 1415 whose sum is 1513 whose sum is 1611 whose sum is 179 whose sum is 187 whose sum is 195 whose sum is 203 whose sum is 211 whose sum is 22.
Complementary
Are said to be supplementary.
complementary