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Question (11)

QN0019050

For (a=10) and (b=15), increasing both by 1 increases the product by

(A) 25
(B) 26
(C) 150
(D) 11

Correct Answer: B

Explanation:

(10+15+1=26).

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Question (12)

QN0019051

The value of ((a+1)(b+1)) is

(A) (ab+a+b+1)
(B) (ab+a+b)
(C) (ab+1)
(D) (ab+a)

Correct Answer: A

Explanation:

Expand using distributive property.

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Question (13)

QN0019052

The increase in the product (24\times30) when both factors are increased by 1 is

(A) 54
(B) 55
(C) 56
(D) 57

Correct Answer: B

Explanation:

(24+30+1=55).

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Question (14)

QN0019053

((a+1)(b-1)) simplifies to

(A) (ab+a-b-1)
(B) (ab+b-a-1)
(C) (ab+b+a+1)
(D) (ab-a-b+1)

Correct Answer: B

Explanation:

Expand and simplify.

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Question (15)

QN0019054

For (a=8), (b=12), the change in product when

(A) +3
(B) +4
(C) −3
(D) −4

Correct Answer: A

Explanation:

(b-a-1=12-8-1=3).

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Question (16)

QN0019055

Which expression represents Identity 1?

(A) ((a+m)(b+n)=ab+am+bn)
(B) ((a+m)(b+n)=ab+mb+an+mn)
(C) ((a+m)(b+n)=ab+mn)
(D) ((a+m)(b+n)=ab+an)

Correct Answer: B

Explanation:

Identity 1 expansion.

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Question (17)

QN0019056

The increase in the product when numbers

(A) (mn)
(B) (ab)
(C) (an+bm+mn)
(D) (a+b+m+n)

Correct Answer: C

Explanation:

Increase = new product − old product.

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Question (18)

QN0019057

If (a=20), (b=15), (m=2), (n=3), then the increase in the product is

(A) 96
(B) 81
(C) 91
(D) 101

Correct Answer: A

Explanation:

(20×3+15×2+2×3=96).

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Question (19)

QN0019058

Expand ((x+4)(y+2)).

(A) (xy+2x+4y+8)
(B) (xy+8)
(C) (xy+2x+4y)
(D) (x+y+8)

Correct Answer: A

Explanation:

Multiply each term.

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Question (20)

QN0019059

Expand ((a+3)(b+5)).

(A) (ab+8)
(B) (ab+3b+5a+15)
(C) (ab+15)
(D) (ab+3a+5b)

Correct Answer: B

Explanation:

Use distributive property.

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Question (11)

For (a=10) and (b=15), increasing both by 1 increases the product by

Explanation:

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Question (12)

The value of ((a+1)(b+1)) is

Explanation:

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Question (13)

The increase in the product (24\times30) when both factors are increased by 1 is

Explanation:

Link:

Question (14)

((a+1)(b-1)) simplifies to

Explanation:

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Question (15)

For (a=8), (b=12), the change in product when

Explanation:

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Question (16)

Which expression represents Identity 1?

Explanation:

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Question (17)

The increase in the product when numbers

Explanation:

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Question (18)

If (a=20), (b=15), (m=2), (n=3), then the increase in the product is

Explanation:

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Question (19)

Expand ((x+4)(y+2)).

Explanation:

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Question (20)

Expand ((a+3)(b+5)).

Explanation:

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