Which of the following number is NOT divisible by 11?
Show answer & explanation
Correct answer: A
Explanation
Given:
Numbers = 1235, 4862, 1254, 1639
According to the formula:
Divisibility by 11 → (Difference between the sums of alternate digits) is 0 or a multiple of 11
1235 → (1+3) − (2+5) = 4 − 7 = −3
4862 → (4+6) − (8+2) = 10 − 10 = 0
1254 → (1+5) − (2+4) = 6 − 6 = 0
1639 → (1+3) − (6+9) = 4 − 15 = −11