Secondary School (English Medium) (5 to 8) कक्षा ८ - CBSE Question Bank Solutions

Simplify and express the result in power notation with positive exponent.

(3⁻⁷ ÷ 3⁻¹⁰) × 3⁻⁵

Simplify and express the result in power notation with positive exponent.

2⁻³ × (−7)⁻³

Two persons could fit new windows in house in 3 days.

How many persons would be needed to fit the windows in one day?

Using appropriate properties find.

`-2/3 xx 3/5 + 5/2 - 3/2 xx 1/6`

Using appropriate properties find

`2/5 xx (-3/7) - 1/6 xx 3/2 + 1/14 xx 2/5`

Name the property under multiplication used in given:

`-13/17 xx ((-2)/7) = (-2)/7 xx ((-13)/17)`

Name the property under multiplication used in given:

`-19/29 xx 29/(-19) = 1`

Construct the following quadrilaterals.

Quadrilateral LIFT

LI = 4 cm

IF = 3 cm

TL = 2.5 cm

LF = 4.5 cm

IT = 4 cm

Construct the following quadrilaterals.

Quadrilateral GOLD

OL = 7.5 cm

GL = 6 cm

GD = 6 cm

LD = 5 cm

OD = 10 cm

Construct the following quadrilaterals.

Rhombus BEND

BN = 5.6 cm

DE = 6.5 cm

The squares of which of the following would be odd numbers?

1. 431
2. 2826
3. 7779
4. 82004

Observe the following pattern and find the missing digits.

11² = 121

101² = 10201

1001² = 1002001

100001² = 1 ______ 2 ______ 1

10000001² = ______

Observe the following pattern and supply the missing number.

11² = 121

101² = 10201

10101² = 102030201

1010101² = _____

____² = 10203040504030201.

Using the given pattern, find the missing numbers.

1² + 2² + 2² = 3²

2² + 3² + 6² = 7²

3² + 4² + 12² = 13²

4² + 5² + _ ² = 21²

5² + _ ² + 30² = 31²

6² + 7² + _ ² = __²

Without adding find the sum:

1 + 3 + 5 + 7 + 9 

Without adding, find the sum:

1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19

Without adding, find the sum:

1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 + 21 + 23

Express 49 as the sum of 7 odd numbers.

Express 121 as the sum of 11 odd numbers.

How many numbers lie between squares of the given numbers?

12 and 13