Find the wrong number in the series given below:
1, 2, 5, 14, 41, 125नीचे दी गई श्रृंखला में गलत संख्या ज्ञात कीजिए:
1, 2, 5, 14, 41, 125

1. A125
2. B5
3. C2
4. D41

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Correct answer: A. 125

Explanation

The rule is: next term = (previous term × 3) − 1. Thus 1×3−1 = 2, 2×3−1 = 5, 5×3−1 = 14, 14×3−1 = 41 and 41×3−1 = 122. The last term should be 122, so 125 is the wrong number.नियम है: अगला पद = (पिछला पद × 3) − 1। इस प्रकार 1×3−1 = 2, 2×3−1 = 5, 5×3−1 = 14, 14×3−1 = 41 तथा 41×3−1 = 122। अंतिम पद 122 होना चाहिए, अतः 125 गलत संख्या है।