999
144 is divisible by 12 and 9.
531 is one of them and that any 3 digit number whose digital sum is 9 is also divisible by 9
If you multiply 2*9, you get 18. Multiply that by 10 to get a three digit number, and you get 180.
135
The least three-digit number that is divisible by both 5 and 9 is 135.
180
225
900
999
144 is divisible by 12 and 9.
100. The highest 3 digit number divisible by 9 is 999 (111 times). The highest 2 digit number divisible by 9 is 99 (11 times). The difference is 100.
531 is one of them and that any 3 digit number whose digital sum is 9 is also divisible by 9
To be divisible by both 4 and 9 a number must be a multiple of the Least Common Factor of 4 and 9. The LCM is 36. The first 3 digit number in each hundred that is a multiple of 36 are as follows :- 108, 216, 324, 432, 504, 612, 720, 828 and 900.
If you multiply 2*9, you get 18. Multiply that by 10 to get a three digit number, and you get 180.
135
Of the ten digits, 0 is the only one that is divisible by 9.