The only two single digit numbers that add up to 18 are 9 and 9.
9x9=18 18/9=9 therefore the answer is 9
81
0.1154
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.
I am a 3 digit number divisible by 7 but not 2 the sum of my digits is 4 what number am I
A) If a number has two digits, then the sum of its digits is less than the value of the original two-digit number.
It appears that only single digit numbers work (0 thru 9)
49
81
81...........
The sum is 22 times the sum of the three digits.
2
81 -- 8+1 = 9 -- square root of 81 = 9