Question

Find the cube root of 15625 through estimation

Answer 1

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$15625$

Separate the last three digits,

15 | 625

'625' ends with '5' so the cube root will surely end with digit '5'.

Cube root = ? | 5

'15' lies between '2³' and '3³'

The smaller number is '2' so cube root starts with '2'.

=> 2 | 5

=> 25