Of the ten digits, 0 is the only one that is divisible by 9.
A three-digit number is divisible by 9 if the sum of its digits is divisible by 9. For example, the number 108 is a three-digit number, and the sum of its digits (1 + 0 + 8) equals 9, which is divisible by 9. Other examples include 117 and 126.
The least three-digit number that is divisible by both 5 and 9 is 135.
The largest three-digit number is 999. To determine if it is a multiple of three, we can check if the sum of its digits (9 + 9 + 9 = 27) is divisible by three. Since 27 is divisible by three, 999 is the largest three-digit multiple of three.
987
144 is divisible by 12 and 9.
225
999
900
900
180
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.
3, 6, 9