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Question (1)

QN0030878

Which of the following is called an equation?

(A) 3x + 5
(B) 2x + 7 = 15
(C) 5y – 2
(D) 4a

Correct Answer: B

Explanation:

An equation contains an equal sign (=).

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Question (2)

QN0030879

Which part of the equation 5x + 8 = 23 is called the Left Hand Side (LHS)?

(A) 23
(B) 5x
(C) 5x + 8
(D) 8 = 23

Correct Answer: C

Explanation:

The expression before '=' is the Left Hand Side (LHS).

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Question (3)

QN0030880

In the equation 7n – 5 = 30, the unknown is

(A) 7
(B) 5
(C) 30
(D) n

Correct Answer: D

Explanation:

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Question (4)

QN0030881

Which operation keeps an equation balanced?

(A) Adding the same number to both sides
(B) Adding different numbers to both sides
(C) Multiplying only one side by 2
(D) Subtracting a number from only one side

Correct Answer: A

Explanation:

Equality is preserved only when the same operation is performed on both sides.

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Question (5)

QN0030882

Solve: x + 19 = 47.

(A) 26
(B) 28
(C) 66
(D) 18

Correct Answer: B

Explanation:

x = 47 – 19 = 28.

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Question (6)

QN0030883

Solve: 8y = 72.

(A) 8
(B) 9
(C) 10
(D) 11

Correct Answer: B

Explanation:

Divide both sides by 8 to get y = 9.

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Question (7)

QN0030884

Solve: 4a – 9 = 27.

(A) 8
(B) 9
(C) 10
(D) 12

Correct Answer: B

Explanation:

Add 9 to both sides and divide by 4 to get a = 9.

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Question (8)

QN0030885

Solve: 3m + 8 = 2m + 20.

(A) 10
(B) 11
(C) 12
(D) 14

Correct Answer: C

Explanation:

Subtract 2m and then subtract 8. Hence, m = 12.

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Question (9)

QN0030886

The number of matchsticks in a pattern is given by 2n + 1. If the pattern has 81 matchsticks, what is the position number?

(A) 39
(B) 40
(C) 41
(D) 42

Correct Answer: B

Explanation:

2n + 1 = 81 ⇒ 2n = 80 ⇒ n = 40.

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Question (10)

QN0030887

A notebook costs ₹40. A fixed delivery charge is ₹60. If the total bill is ₹340, how many notebooks were bought?

(A) 6
(B) 7
(C) 8
(D) 9

Correct Answer: B

Explanation:

40x + 60 = 340 ⇒ 40x = 280 ⇒ x = 7.

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Question (1)

Which of the following is called an equation?

Explanation:

Link:

Question (2)

Which part of the equation 5x + 8 = 23 is called the Left Hand Side (LHS)?

Explanation:

Link:

Question (3)

In the equation 7n – 5 = 30, the unknown is

Explanation:

Link:

Question (4)

Which operation keeps an equation balanced?

Explanation:

Link:

Question (5)

Solve: x + 19 = 47.

Explanation:

Link:

Question (6)

Solve: 8y = 72.

Explanation:

Link:

Question (7)

Solve: 4a – 9 = 27.

Explanation:

Link:

Question (8)

Solve: 3m + 8 = 2m + 20.

Explanation:

Link:

Question (9)

The number of matchsticks in a pattern is given by 2n + 1. If the pattern has 81 matchsticks, what is the position number?

Explanation:

Link:

Question (10)

A notebook costs ₹40. A fixed delivery charge is ₹60. If the total bill is ₹340, how many notebooks were bought?

Explanation:

Link:

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