Find the greatest 4-digit number exactly divisible by 3, 4 and 5?
Correct answer: B. 9960
- A. 9985
- B. 9960
- C. 9957
- D. 9975
Explanation
The least common multiple of 3, 4 and 5 is 60, so the required number must be a multiple of 60. The greatest four-digit multiple is 60 x 166 = 9960. The likely mistake is choosing 9985, which is large but not divisible by 4 or 5.
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