102
9
12
If you add all the digits up, and the total equals a number that 3 can go in, then it's a factor of 3.
150
There are none.
144, 324, 576, 900
9
144
3 is a factor of the square number 9.
It is the square of any one of the four multiples of 6 between 10 and 31.
36
114 beacause it's three digits a factor of seven even
144, 324, 576 and 900 are even three-digit square numbers that are multiples of 3.
If that is the case, then three is a factor of the original number.
12
3, 12, 30
If you add all the digits up, and the total equals a number that 3 can go in, then it's a factor of 3.