Find the least square number which is divisible by 10, 12, 15 and 18?
Correct answer: B. 900
- A. 1600
- B. 900
- C. 3600
- D. 2500Islamic Studies Quiz
Explanation
The least common multiple of 10, 12, 15 and 18 is 180 = 2² x 3² x 5. To make this a square, the factor 5 must also occur twice, so the least square multiple is 2² x 3² x 5² = 900. The likely mistake is option c, which is a square multiple but not the least one.
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