Mental Maths Class 7 Cube and Cube Roots

Asked by RAJANYA MONDAL · The Level field School

What is the cube root of 1728?

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Answer: A. 12

1728 ends in 8, and only cubes of numbers ending in 2 end in 8. Since 10^3 = 1000 and 20^3 = 8000, try 12: 12 x 12 x 12 = 144 x 12 = 1728.

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