Subject: General Aptitude · Chapter: Square Roots and Cube Roots · Exam: · Marks: · Difficulty:
Find the least square number which is exactly divisible by 10, 12, 15 and 18.
Answer
Answer (as printed):
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.