What is the smallest perfect square number that is divisible by both 10 and 15?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 900
On factorizing 10 = 2 × 5
On factorizing 15 = 3 × 5
So,
LCM of 10 and 15 = 2 × 3 × 5 = 30
So,
The smallest perfect square divisible by both 10 and 15 = 22 × 32 × 52 = 900