Test 72 for Divisibility by 9

Given Number: 72
Test a Number for Divisibility by Nine (9):
• A Number is divisible by 9 if the Sum of the Digits in the Number is divisible by 9
Sum of the Digits in 72: 7+2 = 9
9 is divisible by 9, 9 ÷ 9 = 1
Therefore, 72 is divisible by 9
Notes:

• 72 ÷ 9 = 8
• Since 3 is a factor of 9, 72 is also divisible by 3