Which number is NOT a multiple of 3?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 377.
A number is divisible by 3 if the sum of its digits is divisible by 3.
369 → 3 + 6 + 9 = 18 (divisible by 3)
372 → 3 + 7 + 2 = 12 (divisible by 3)
375 → 3 + 7 + 5 = 15 (divisible by 3)
377 → 3 + 7 + 7 = 17 (not divisible by 3)