Question

Which of the following numbers is not divisible by 9?

• A. 94896
• B. 84996
• C. 68949
• D. 98967

Hint:

Use the digit-sum rule for 9: if sum of digits is divisible by 9, so is the number.

Answer 1

The Correct Option is D

Divisibility rule for 9: A number is divisible by 9 if the sum of its digits is divisible by 9.
Option D: 9 + 8 + 9 + 6 + 7 = 39 (Not divisible by 9)
Other options:
(A) 9+4+8+9+6 = 36 \(\Rightarrow\) divisible
(B) 8+4+9+9+6 = 36 \(\Rightarrow\) divisible
(C) 6+8+9+4+9 = 36 \(\Rightarrow\) divisible