Secondary School (English Medium) (5 to 8) Class 8 - CBSE Question Bank Solutions

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?

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

`x = (-2)/7, y = (-5)/6` and `z = 1/4`

and What is the name of this property?

Tell which property allows you to compare

`2/3 xx [3/4 xx 5/7]` and `[2/3 xx 5/7] xx 3/4`

Name the property used in the following.

`1/3 + [4/9 + ((-4)/3)] = [1/3 + 4/9] + [(-4)/3]`

If one member of a pythagorean triplet is 2m, then the other two members are ______.

The sum of successive odd numbers 1, 3, 5, 7, 9, 11, 13 and 15 is ______.

The sum of first n odd natural numbers is ______.

The hypotenuse of a right triangle with its legs of lengths 3x × 4x is ______.

If m is the square of a natural number n, then n is ______.

There are ______ natural numbers between n² and (n + 1)²