Question

find the cube root of 857375 using estimation method​

Answer 1

• Make group of 3 digit, starting from right.
• The unit digit of cube root will be. Unit digit of cube root of 857375 = Unit digit of cube root of 375. Since 375 ends in 5, it's cube root will end in 5. (As 5 3 = 12 5 , 1 5 3 = 337 5 )
• Now, for second group. 8 5 7. We note that. 9 3 = 729.

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