Question

If the number 481A673 is completely divisible by 9, what is the smallest whole number in place of A?

• A. 15
• B. 7
• C. 6
• D. 16

Answer 1

Answer:

B. 7

Solution: Concept: Divisblity rule of 9: if the sum of digits of the number is divisible by 9, then the number itself is divisible by 9 Calculation: We have 481A673 If the number is divisible by 9 then 4 + 8 + 1 + 6 + 7 + 3 = multiple of 9 ⇒ 29 + A = multiple of 9 If A = 7, sum become 36 which is divisible by 9. ∴ Smallest whole number is 7.