Multiple choice

In each of these questions a number series is given. Only one number is wrong in each series. You have to find out the wrong number. $1 \; 3 \; 4 \; 7 \; 11 \; 18 \; 27 \; 47$

  1. 4

  2. 11

  3. 18

  4. 7

  5. 27
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

In a Fibonacci-like series where each term equals the sum of the two preceding terms, we verify: 1+3=4 (correct), 3+4=7 (correct), 4+7=11 (correct), 7+11=18 (correct), 11+18=29 (should be 29, not 27), 18+29=47 (correct if previous term is 29). The term 27 breaks the pattern since 11+18=29, not 27. The series should be 1, 3, 4, 7, 11, 18, 29, 47.

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