एक सभागार की पहली पंक्ति में (24) कुर्सियां हैं और हर अगली पंक्ति में (3) कुर्सियां अधिक हैं। (16)वीं पंक्ति में कितनी कुर्सियां होंगी?

An auditorium has (24) chairs in the first row and each next row has (3) more chairs. How many chairs are in the (16)th row?

Explanation opens after your attempt
Correct Answer

B. (69)

Step 1

Concept

\(a_{16}=24+15\times3=69\). Up to the (16)th row, the difference is added (15) times.

Step 2

Why this answer is correct

The correct answer is B. (69). \(a_{16}=24+15\times3=69\). Up to the (16)th row, the difference is added (15) times.

Step 3

Exam Tip

\(a_{16}=24+15\times3=69\)। (16)वीं पंक्ति तक अंतर (15) बार जुड़ता है।

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Mathematics Answer, Explanation and Revision Hints

एक सभागार की पहली पंक्ति में (24) कुर्सियां हैं और हर अगली पंक्ति में (3) कुर्सियां अधिक हैं। (16)वीं पंक्ति में कितनी कुर्सियां होंगी? / An auditorium has (24) chairs in the first row and each next row has (3) more chairs. How many chairs are in the (16)th row?

Correct Answer: B. (69). Explanation: \(a_{16}=24+15\times3=69\)। (16)वीं पंक्ति तक अंतर (15) बार जुड़ता है। / \(a_{16}=24+15\times3=69\). Up to the (16)th row, the difference is added (15) times.

Which concept should I revise for this Mathematics MCQ?

\(a_{16}=24+15\times3=69\). Up to the (16)th row, the difference is added (15) times.

What exam hint can help solve this Mathematics question?

\(a_{16}=24+15\times3=69\)। (16)वीं पंक्ति तक अंतर (15) बार जुड़ता है।