Question

Find the least square number exactly divisible by 6, 8, 9 and 10. with steps

Answer 1

Smallest/ least number divisible by 6,9,15 and 20 is it's LCM

i.e.

LCM=2×2×3×3×5=180

On resolving 180 into prime factors 180.

=2×2×3×3×5

Therefore, there is no factor to form pair of 5 so to make it a perfect square so we multiply 180 with 5 to get 900.

Hence least square number divisible by 6,9,15 and 20 is 900.

Answer 2

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