Suggest any shortcut method to calculate the square and cube root. (it must be trustworthy)
Answers & Comments
swathika23
You can easily find out cube root. see for example have a number 125. put the factor tree for it.
125 / \ 5 25/ \ 5 5/ \ 5 1
now the factors are 5*5*5 pair them up in 3s (only same numbers should be paired) thus only one group is available having three 5's . consider them as 1 we get only one 5.thus the cube root of 125 is 5.
now for more understanding , take 1000 if we put a factor tree we get, 2 *2*2*5*5*5
again pair them in 3's put one group of 3 numbers as one we get (2*2*2) and (5*5*5) =2*5 =10 10 is the cube root of 1000
Answers & Comments
see for example have a number 125.
put the factor tree for it.
125
/ \
5 25/ \
5 5/ \
5 1
now the factors are 5*5*5
pair them up in 3s (only same numbers should be paired)
thus only one group is available having three 5's .
consider them as 1
we get only one 5.thus the cube root of 125 is 5.
now for more understanding , take 1000
if we put a factor tree we get,
2 *2*2*5*5*5
again pair them in 3's
put one group of 3 numbers as one
we get (2*2*2) and (5*5*5)
=2*5
=10
10 is the cube root of 1000
hope it helps!!!!