Question

Find the least perfect square exactly divisible by 4 and 10​

Answer 1

Factories each

4 = 2×2

10 = 2×5

4×10 = 2×2×2×5

For pairing we must need at least 2 no. of same digits...

so we must multiply the no. by 2×5 = 10

i.e. 4×10×10 = 2×2 × 2×2 × 5×5

so the no. is 400

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Answer 2

Answer:

As 5 is not in pair in LCM's factor so we need to multiply 20 by 5 to make it a perfect square. The least perfect square exactly divisible by each of the numbers 4,5,10 is 100. Hope it helps you!

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