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The least square number which is exactly divisible by each of these number 6,9,15 and 20 is

A) 400
B) 900
C) 961
D) 1024

Correct Answer:


B) 900

Description for Correct answer:
Smallest least number divisible by 6,9,15 and 20 is its L.C.M. Its LCM is 180.

Therefore there is no factor to form pair of 5, so to make it a perfect square we multiply 180 with 5 to get 900.
Hence least square number divisible by6,9,15 and 20 is 900.

Part of solved Number System questions and answers : >> Aptitude >> Number System

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