Important Formulas - Square Root and Cube Root - Tricks & Shortcuts

1. Square Root:

If x² = y, we say that the square root of y is x and we write √y = x.

Thus, √4 = 2, √9 = 3,√196 = 14.

2. Cube Root:

The cube root of a given number x is the number whose cube is x.

We, denote the cube root of x by 3√x.

Thus, 3√8 = 3√(2 x 2 x 2) = 2, 3√343 =3√( 7 x 7 x 7) = 7 etc.

Note:

1. √(xy) = √x *√ y

2. √( x/y) =  √x/√y = (√x/√y)*( √y/√y) =  √(xy)/y

Quantitative Aptitude Quizzes and Study Material

Click here for Quantitative Aptitude & Data Interpretation Topics & Formulas