Multiple choice

In each of the following numbers series one of the numbers is wrong find it out:- निम्नलिखित प्रत्येक संख्या श्रंखला में एक संख्या गलत है इसका पता लगाइए:- 6,14,31,64,137,280

  1. 31

  2. 64

  3. 137

  4. 280
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The series 6, 14, 31, 64, 137, 280 should follow the pattern: ×2+2, ×2+3, ×2+4, ×2+5, ×2+6. Checking: 6×2+2=14✓, 14×2+3=31✓, 31×2+4=66 (not 64), 64×2+5=133 (not 137), 137×2+6=280✓. The number 64 breaks the pattern - it should be 66.

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