Question

46. The least perfect square exactly divisible by each of the numbers 6, 9, 15 and 20 is (a) 3600 (b) 900 (c) 400 (d) 225 6 is: A7 A factor of polymomial PG - Y
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Answer 1

Step-by-step explanation:

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.

Answer 2

Answer:

Solutions :-

∴ LCM 

= 3 × 5 × 2 × 3 × 2 = 180.

The least multiple of 180 which is a

perfect square is

180 × 5 = 900