Secondary School (English Medium) (5 to 8) इयत्ता ८ - CBSE Question Bank Solutions for Mathematics

Find a Pythagorean triplet in which one member is 12.

Find the cube root of 8000.

Find the cube root of 13824 by prime factorisation method.

Find the area of a rhombus whose diagonals are of lengths 10 cm and 8.2 cm.

Find the value of 2^–3.

Find the value of `1/(3^(-2))`.     

Simplify :
(– 4)⁵ × (– 4)^-10

Simplify and write the answer in the exponential form.
 (2⁵ ÷ 2⁸)⁵ × 2^-5

Simplify and write the answer in the exponential form.

Simplify and write the answer in the exponential form.

`1/8 xx (3)^(-3)`

Simplify and write the answer in the exponential form.

`(- 3)^4 xx (5/3)^4`

Find: `(-4)/5 xx 3/7 xx 15/16 xx ((-14)/9)`.

Which of the following expressions shows that rational numbers are associative under multiplication?

Tell which property allows you to compute `1/5 xx [5/6 xx 7/9]` as `[1/5 xx 5/6] xx 7/9`

Verify the property x × (y × z) = (x × y) × z of rational numbers by using

`x = 1, y = (-1)/2` and `z = 1/4`

and What is the name of this property?

Verify the property x × (y × z) = (x × y) × z of rational numbers by using

`x = 2/3, y = (-3)/7` and `z = 1/2`

and What is the name of this property?