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Question (11)

QN0015597

Which expression is written correctly using omission of the multiplication symbol?

(A) 3×x
(B) 3x
(C) 3+x
(D) x+3

Correct Answer: B

Explanation:

The standard algebraic form is 3x.

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Question (12)

QN0015598

The expression 11 × n × 2 can be written as:

(A) 11n2
(B) 22n
(C) 13n
(D) 112n

Correct Answer: B

Explanation:

11 × 2 = 22, so expression becomes 22n.

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Question (13)

QN0015599

Simplify: 5 × a × 3

(A) 8a
(B) 15a
(C) 53a
(D) 5a3

Correct Answer: B

Explanation:

5 × 3 = 15, so 15a.

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Question (14)

QN0015600

Simplify: 4 × m × 5

(A) 9m
(B) 20m
(C) 45m
(D) 4m5

Correct Answer: B

Explanation:

4 × 5 = 20, so 20m.

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Question (15)

QN0015601

Which is the simplified form of 7 × x × 2?

(A) 9x
(B) 14x
(C) 72x
(D) x14

Correct Answer: B

Explanation:

7 × 2 = 14, so 14x.

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Question (16)

QN0015602

The expression 3 × a × b is usually written as:

(A) 3+a+b
(B) 3ab
(C) ab3+
(D) 3(a+b)

Correct Answer: B

Explanation:

Product of 3, a and b is written as 3ab.

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Question (17)

QN0015603

Which expression represents the product of p and q?

(A) p+q
(B) pq
(C) p−q
(D) p/q

Correct Answer: B

Explanation:

pq means p × q.

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Question (18)

QN0015604

The algebraic form of 2 × x × y is:

(A) 2+x+y
(B) xy2
(C) 2xy
(D) 2(x+y)

Correct Answer: C

Explanation:

Multiplication symbols are omitted.

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Question (19)

QN0015605

Which expression represents 5 multiplied by m and n?

(A) 5+m+n
(B) 5mn
(C) mn+5
(D) 5(m+n)

Correct Answer: B

Explanation:

5 × m × n = 5mn.

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Question (20)

QN0015606

Evaluate 3xy when x = 2 and y = 4.

(A) 24
(B) 12
(C) 9
(D) 18

Correct Answer: A

Explanation:

3 × 2 × 4 = 24.

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