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UPSC Prelims

Mathematics

Theme:

Sequences and Series / श्रेणी और अनुक्रम

Q50 2021, Sequences and Series

What is the value of 'X' in the sequence 2, 7, 22, 67, 202, X, 1822?

अनुक्रम 2, 7, 22, 67, 202, X, 1822 में 'X' का मान क्या है ?

Explanation Please wait..

The pattern being followed here is given below:

2 × 3 + 1 = 7;

7 × 3 + 1 = 22;

22 × 3 + 1 = 67;

67 × 3 + 1 = 202;

202 × 3 + 1 = 607;

607 × 3 + 1 = 1822.

Hence, our answer is 607.

व्याख्या Please wait..

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