Find the least square number which is exactly divisible by 10, 12, 15 and 18. · ABC26GN1321
Subject: General Aptitude · Chapter: Square Roots and Cube Roots
Find the least square number which is exactly divisible by 10, 12, 15 and 18.
Answer
No answer key was printed for this question.
Explanation
L.C.M. of 10, 12, 15, 18 = 180. Now, 180 = 2 × 2 × 3 × 3 × 5 = 22 × 32 × 5. To make it a perfect square, it must be multiplied by 5. ∴ Required number = (22 × 32 × 52) = 900.
Explanation as extracted from the printed page; notation may be imperfect.