Question

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

Answer 1

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 $2 × 5 × 2= 20$ to make it a perfect cube.

Hence he needs $20$ cuboids.