Which of the following numbers divides 81,42,42,541?

Check divisibility:

1. 8
Last three digits = 541
👉 541 is not divisible by 8 ❌

2. 12
12 = 3 × 4 → must be divisible by both 3 and 4

• Last two digits = 41 → not divisible by 4 ❌
  👉 Not divisible

3. 15
15 = 3 × 5 → must be divisible by both 3 and 5

• Last digit ≠ 0 or 5 → ❌
  👉 Not divisible

4. 7
On division:
$ 814242541 \div 7 = 116320363 $ (exact integer) ✅

Final Answer: 7