Mental Maths 7>Chapter 12 - Algebraic Expressions>Question Bank>Q 34

EASY

7th CBSE

IMPORTANT

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What is the number of diagonals that can be drawn from one vertex of a pentagon.

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Important Questions on Algebraic Expressions

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7th CBSE

IMPORTANT

Mental Maths 7>Chapter 12 - Algebraic Expressions>Question Bank>Q 37

If the side of a square is

5 y

units, then find the perimeter of the square

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7th CBSE

IMPORTANT

Mental Maths 7>Chapter 12 - Algebraic Expressions>Question Bank>Q 38

If

z = 4

, find the value of

4 - 2 (5 - z) .

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7th CBSE

IMPORTANT

Mental Maths 7>Chapter 12 - Algebraic Expressions>Question Bank>Q 39

If

x - k y

is added to

7 x + y

to get

8 x - 5 y

, then find the value of

k

.

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7th CBSE

IMPORTANT

Mental Maths 7>Chapter 12 - Algebraic Expressions>WORKSHEET>Q 1

If sum of

7 x ² - 5 x + 5, - 7 x ² + 5 x - 2

and

8 x ² - 2 x + 1

is of the form

a x^{2} + b x + c

, then find the value of

(a + b + c)

.

HARD

7th CBSE

IMPORTANT

Mental Maths 7>Chapter 12 - Algebraic Expressions>WORKSHEET>Q 4

Subtract

(3 a - 2 b + c)

from the sum of

(3 a + 4 b + c)

and

(- 4 a - b + c) .

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7th CBSE

IMPORTANT

Mental Maths 7>Chapter 12 - Algebraic Expressions>WORKSHEET>Q 9

Evaluate

a^{4} - b^{4}

if

a = 2, b = 1

.

EASY

7th CBSE

IMPORTANT

Mental Maths 7>Chapter 12 - Algebraic Expressions>WORKSHEET>Q 11

Total students in a school are

7 a^{2} + 5 a + 9

in which number of boys are

2 a^{2} - a + 2

. If the number of girls who are enrolled is of the form

k a^{2} + m a + n

, then find the value of

(k + m + n)

.

HARD

7th CBSE

IMPORTANT

Mental Maths 7>Chapter 12 - Algebraic Expressions>WORKSHEET>Q 12

If the sum of

- a^{2} + 5 a + 7

and

7 a^{2} - 5 a + 5

is subtracted from the sum of

4 a + 5

and

- 5 a + 7

to get the result as

k a^{2} + m a

, then find the value of

(k + m)

.