Nimmy makes a cuboid of plasticine of sides 7 cm, 2 cm, 7 cm. How many such cuboids will she need to form a cube?
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How many such cuboids will he need to form a cube? Factors of 5 and 2 both are not in a group of three. Therefore, the number must be multiplied by = 2 × 5 × 2 2\times5\times2 2×5×2= 20 to make it a perfect cube. Hence he needs 20 cuboids
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