समांतर श्रेणी \(3,\Box,15,21,\ldots\) में रिक्त पद क्या होगा?

What is the missing term in the arithmetic progression \(3,\Box,15,21,\ldots\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

C. (9)

Step 1

Concept

The difference between (15) and (21) is (6), so the missing term is (15-6=9). In exams, apply the common difference backward too.

Step 2

Why this answer is correct

The correct answer is C. (9). The difference between (15) and (21) is (6), so the missing term is (15-6=9). In exams, apply the common difference backward too.

Step 3

Exam Tip

(15) और (21) का अंतर (6) है, इसलिए रिक्त पद (15-6=9) है। परीक्षा में पीछे की ओर भी सार्व अंतर लगाएँ।

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Mathematics Answer, Explanation and Revision Hints

समांतर श्रेणी \(3,\Box,15,21,\ldots\) में रिक्त पद क्या होगा? / What is the missing term in the arithmetic progression \(3,\Box,15,21,\ldots\)?

Correct Answer: C. (9). Explanation: (15) और (21) का अंतर (6) है, इसलिए रिक्त पद (15-6=9) है। परीक्षा में पीछे की ओर भी सार्व अंतर लगाएँ। / The difference between (15) and (21) is (6), so the missing term is (15-6=9). In exams, apply the common difference backward too.

Which concept should I revise for this Mathematics MCQ?

The difference between (15) and (21) is (6), so the missing term is (15-6=9). In exams, apply the common difference backward too.

What exam hint can help solve this Mathematics question?

(15) और (21) का अंतर (6) है, इसलिए रिक्त पद (15-6=9) है। परीक्षा में पीछे की ओर भी सार्व अंतर लगाएँ।