Multiple choice

In the following number series only one number is wrong. Find out the wrong number. 22, 12, 13.5, 23, 47, 120.5, 365

  1. 120.5

  2. 13.5

  3. 23

  4. 47

  5. 365
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The pattern is: 22*0.5+1=12; 12*1+1.5=13.5; 13.5*1.5+2=22.25; 22.25*2+2.5=47. The number 23 is incorrect and should be 22.25.

AI explanation

The series follows a pattern of multiplying by 0.5 and adding 1 to get the next term. Following this rule, 13.5 multiplied by 0.5 plus 1 gives 7.75, and 7.75 multiplied by 0.5 plus 1 gives 4.875. The term 23 is wrong because the sequence should transition from 13.5 to 7.75 instead.

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