Multiple choice

In the following number series, one number is wrong. Find out that number. 1,2,8,33,149,765,4626

  1. 33

  2. 8

  3. 149

  4. 765
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C Correct answer
Explanation

Pattern: 1*1+1=2, 2*2+4=8, 8*3+9=33, 33*4+16=148. The term 149 is incorrect; it should be 148.

AI explanation

The underlying pattern multiplies the previous term by its position index and then adds a progressively increasing even number: 1(1)+1=2, 2(2)+4=8, 8(3)+9=33, and 33(4)+16 should equal 148. The series incorrectly lists 149 instead of 148. Therefore, 149 is the wrong number.

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