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Question (21)

QN0030898

Solve: 9x + 7 = 70.

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

Correct Answer: B

Explanation:

x = (70 – 7)/9 = 7.

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Question (22)

QN0030899

Solve: 6m – 15 = 3m + 12.

(A) 7
(B) 8
(C) 9
(D) 10

Correct Answer: C

Explanation:

3m = 27 ⇒ m = 9.

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Question (23)

QN0030900

Solve: y/12 = 9.

(A) 96
(B) 98
(C) 108
(D) 120

Correct Answer: C

Explanation:

y = 9 × 12 = 108.

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Question (24)

QN0030901

A taxi charges a fixed amount of ₹150 and ₹20 per kilometre. If the total fare is ₹550, how many kilometres were travelled?

(A) 18 km
(B) 19 km
(C) 20 km
(D) 22 km

Correct Answer: C

Explanation:

20x + 150 = 550 ⇒ x = 20 km.

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Question (25)

QN0030902

The number of sticks required for a pattern is given by 4n + 1. If 101 sticks are used, the position number is

(A) 24
(B) 25
(C) 26
(D) 27

Correct Answer: B

Explanation:

4n + 1 = 101 ⇒ n = 25.

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Question (26)

QN0030903

Solve: 5(a – 2) = 40.

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

Correct Answer: C

Explanation:

a – 2 = 8 ⇒ a = 10.

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Question (27)

QN0030904

Ravi thinks of a number. He doubles it and then adds 9. The result is 35. What was the original number?

(A) 11
(B) 12
(C) 13
(D) 14

Correct Answer: C

Explanation:

2x + 9 = 35 ⇒ x = 13.

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Question (28)

QN0030905

Which equation has the solution x = 8?

(A) 3x + 2 = 22
(B) 2x – 5 = 9
(C) 4x + 1 = 29
(D) .

Correct Answer: D

Explanation:

Substituting x = 8 satisfies only option (d).

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Question (29)

QN0030906

Solve: 8p + 16 = 4p + 40.

(A) 5
(B) 6
(C) 7
(D) 8

Correct Answer: B

Explanation:

4p = 24 ⇒ p = 6.

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Question (30)

QN0030907

Meena has ₹900 in her savings. She saves ₹125 every month. After how many months will she have ₹1900?

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

Correct Answer: C

Explanation:

900 + 125m = 1900 ⇒ m = 8.

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