Parikshit makes a cuboid of plasticine of sides 5cm, 2cm, 5cm. How many cuboids will he need to form a cube?

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Solution

Given numbers =5×2×5
Since, Factors of 5 and 2 both are not in group of three.
Therefore, the number must be multiplied by 2×2×5=20 to make it a perfect cube. Hence he needs 20 cuboids.

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