**NCERT Solutions Class 8 Maths Chapter 7 Cube And Cube …**
https://byjus.com/ncert-solutions-class-8-maths/chapter-7-cube-and-cube-roots/

3. You are told that 1,331 is a perfect cube. Can you guess without factorisation what is its cube root? Similarly, guess the cube roots of 4913, 12167, 32768. Solution: (i) By grouping the digits, we get 1 and 331. We know that, since, the unit digit of cube is 1, the unit digit of cube root is 1. ∴ We get 1 as unit digit of the cube root of 1331.

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