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Question (1)

QN0015507

Letters used to represent numbers in mathematics are called:

(A) Constants
(B) Symbols
(C) Letter-numbers
(D) Terms

Correct Answer: C

Explanation:

Letters used in place of numbers are called letter-numbers.

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Question (2)

QN0015508

An algebraic expression is a mathematical expression that contains:

(A) Only numbers
(B) Only letters
(C) Letter-numbers and/or numbers
(D) Only symbols

Correct Answer: C

Explanation:

Algebraic expressions contain numbers and letter-numbers.

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Question (3)

QN0015509

If Aftab’s age is represented by a and Shabnam is 3 years older, Shabnam’s age is:

(A) a – 3
(B) a + 3
(C) 3a
(D) a ÷ 3

Correct Answer: B

Explanation:

3 years older means add 3 to a.

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Question (4)

QN0015510

If s = a + 3 and a = 15, then s =

(A) 12
(B) 15
(C) 18
(D) 45

Correct Answer: C

Explanation:

s = 15 + 3 = 18.

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Question (5)

QN0015511

If Aftab’s age is represented by a and Shabnam’s age by s, then Aftab’s age in terms of s is:

(A) s + 3
(B) s – 3
(C) 3s
(D) s ÷ 3

Correct Answer: B

Explanation:

Aftab is 3 years younger than Shabnam.

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Question (6)

QN0015512

If s = 20, then a = s – 3 equals:

(A) 17
(B) 20
(C) 23
(D) 60

Correct Answer: A

Explanation:

a = 20 – 3 = 17.

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Question (7)

QN0015513

Each L-shaped pattern requires 2 matchsticks. The expression for n L-shapes is:

(A) n + 2
(B) n – 2
(C) 2n
(D) n²

Correct Answer: C

Explanation:

Each L uses 2 matchsticks, so total = 2n.

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Question (8)

QN0015514

How many matchsticks are needed for 27 L-shapes?

(A) 29
(B) 54
(C) 25
(D) 81

Correct Answer: B

Explanation:

2 × 27 = 54.

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Question (9)

QN0015515

The cost of one coconut is ₹35. The expression for the cost of c coconuts is:

(A) c + 35
(B) 35 + c
(C) 35c
(D) c ÷ 35

Correct Answer: C

Explanation:

Cost = Number × Price = 35c.

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Question (10)

QN0015516

The cost of 1 kg jaggery is ₹60. The expression for j kg jaggery is:

(A) 60j
(B) j + 60
(C) 60 + j
(D) j ÷ 60

Correct Answer: A

Explanation:

Cost = 60 × j = 60j.

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Question (1)

Letters used to represent numbers in mathematics are called:

Explanation:

Link:

Question (2)

An algebraic expression is a mathematical expression that contains:

Explanation:

Link:

Question (3)

If Aftab’s age is represented by a and Shabnam is 3 years older, Shabnam’s age is:

Explanation:

Link:

Question (4)

If s = a + 3 and a = 15, then s =

Explanation:

Link:

Question (5)

If Aftab’s age is represented by a and Shabnam’s age by s, then Aftab’s age in terms of s is:

Explanation:

Link:

Question (6)

If s = 20, then a = s – 3 equals:

Explanation:

Link:

Question (7)

Each L-shaped pattern requires 2 matchsticks. The expression for n L-shapes is:

Explanation:

Link:

Question (8)

How many matchsticks are needed for 27 L-shapes?

Explanation:

Link:

Question (9)

The cost of one coconut is ₹35. The expression for the cost of c coconuts is:

Explanation:

Link:

Question (10)

The cost of 1 kg jaggery is ₹60. The expression for j kg jaggery is:

Explanation:

Link:

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