1.

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.

Answer» 1) 1331
`10^3<1331<20^3`
`1331=11^3`
2)4913
`10^3<4913<20^3`
`4913=17^3`
3)12167
`20^3<12167<30^3`
`12167=23^3`4)32768
`30^3<32768<40^3`
`32768=32^3`.


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