Maths Questions Answers
Class - VIII - Maths
What is a Cube Root (Page 6/7)
(Contiued from page 5 )
As we have done in square roots section, in cube roots also you may find the question like smallest number to multiple / divide.
Just follow the methods described in sq roots section. Here is an examples.
Question - Type 8 -
By which number 432 is to be divided to make it perfect cube and what is the cube root.
Answer - 8-
Make the factors of 432
432=
2*2*2*2*
3*3*3
Now after making group of three, one '2' is left out. Therefore it's to be divided with 2
Now take the numbers, who is having a pair of three; and the cube root is 2*3=6
Now check the answer.
432/2=216 &
the cube of 6 is 6*6*6=216
and 216 is a perfect cube
(Cont..... to page 7 )
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( What is a Cube Root)