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Question (21)

QN009059

How many tiles are present at Stage 26 in the pattern 2n−1?

(A) 49
(B) 50
(C) 51
(D) 52

Correct Answer: C

Explanation:

2(26)−1=51

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Question (22)

QN009060

Which stage contains 21 tiles in the pattern 2n−1?

(A) 9
(B) 10
(C) 11
(D) 12

Correct Answer: C

Explanation:

2n−1=21⇒n=11

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Question (23)

QN009061

Bela has ₹100 and spends ₹5 daily. The amount left after n days is:

(A) 100+5n
(B) 100−5n
(C) 5n−100
(D) 100n−5

Correct Answer: B

Explanation:

Amount decreases by ₹5 daily.

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Question (24)

QN009062

How much money remains with Bela after 12 days?

(A) ₹35
(B) ₹40
(C) ₹45
(D) ₹50

Correct Answer: B

Explanation:

100−5(12)=40

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Question (25)

QN009063

An auto-rickshaw charges ₹25 for first 2 km and ₹15 per km afterwards. What is the fare for 6 km?

(A) ₹70
(B) ₹75
(C) ₹80
(D) ₹85

Correct Answer: D

Explanation:

25+15(4)=85

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Question (26)

QN009064

Which expression represents the fare for n km in the auto-rickshaw problem for n≥2?

(A) 25+15n
(B) 15n−5
(C) 25n−15
(D) 10n+25

Correct Answer: B

Explanation:

Simplified form is 15n−5

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Question (27)

QN009065

A student has ₹500 and gets ₹150 every month. How much money will the student have after 3 months?

(A) ₹800
(B) ₹850
(C) ₹900
(D) ₹950

Correct Answer: D

Explanation:

500+150×3=950

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Question (28)

QN009066

A rally starts with 120 members and 9 leave every hour. Which expression represents the remaining members after h hours?

(A) 120+9h
(B) 120−9h
(C) 9h−120
(D) 120h−9

Correct Answer: B

Explanation:

Members decrease by 9 every hour.

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Question (29)

QN009067

A rectangular box has length 7 cm and breadth 11 cm. Which expression represents its volume if height is h cm?

(A) 18h
(B) 77h
(C) 7+11+h
(D) 7h+11

Correct Answer: B

Explanation:

Volume =7×11×h

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Question (30)

QN009068

Sarita reads 20 pages daily from a 500-page book. Which expression gives the remaining pages after d days?

(A) 500+20d
(B) 500−20d
(C) 20d−500
(D) 520d

Correct Answer: B

Explanation:

Remaining pages decrease daily.

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Question (21)

How many tiles are present at Stage 26 in the pattern 2n−1?

Explanation:

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Question (22)

Which stage contains 21 tiles in the pattern 2n−1?

Explanation:

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Question (23)

Bela has ₹100 and spends ₹5 daily. The amount left after n days is:

Explanation:

Link:

Question (24)

How much money remains with Bela after 12 days?

Explanation:

Link:

Question (25)

An auto-rickshaw charges ₹25 for first 2 km and ₹15 per km afterwards. What is the fare for 6 km?

Explanation:

Link:

Question (26)

Which expression represents the fare for n km in the auto-rickshaw problem for n≥2?

Explanation:

Link:

Question (27)

A student has ₹500 and gets ₹150 every month. How much money will the student have after 3 months?

Explanation:

Link:

Question (28)

A rally starts with 120 members and 9 leave every hour. Which expression represents the remaining members after h hours?

Explanation:

Link:

Question (29)

A rectangular box has length 7 cm and breadth 11 cm. Which expression represents its volume if height is h cm?

Explanation:

Link:

Question (30)

Sarita reads 20 pages daily from a 500-page book. Which expression gives the remaining pages after d days?

Explanation:

Link:

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