Test 45 for Divisibility by 9

Given Number: 45
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 45: 4+5 = 9
9 is divisible by 9, 9 ÷ 9 = 1
Therefore, 45 is divisible by 9
Notes:

• 45 ÷ 9 = 5
• Since 3 is a factor of 9, 45 is also divisible by 3