Which of the following number is divisible by both 9 and 11?
Show answer & explanation
Correct answer: A
Explanation
Given:
Numbers = 7920, 8250, 8020, 8163
According to the formulas:
Divisibility by 9 → The sum of the digits is divisible by 9.
Divisibility by 11 → The difference between the sums of the alternate digits is 0 or a multiple of 11.
7920 → (7+9+2+0)=18, (7+2)-(9+0)=9-9=0 (Divisible)
8250 → (8+2+5+0)=15
8020 → (8+0+2+0)=10
8163 → (8+1+6+3)=18