Question

the class.
17. Find the least square number which is exactly divisible by each of the numbers 6, 9, 15
and 20.

please tell as fast as possible its urgent..
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Answer 1

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.

900/6=150

900/9=100

900/15=60

900/20=45

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