Multiple choice

Directions: In the following number series, one of the numbers does not fit into the series. Find the wrong number. 844, 420, 208, 102, 47, 22.5, 9.25

  1. 420

  2. 208

  3. 47

  4. 22.5
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C Correct answer
Explanation

The pattern is (previous term / 2) - 2. 844/2 - 2 = 420; 420/2 - 2 = 208; 208/2 - 2 = 102; 102/2 - 2 = 49 (not 47); 49/2 - 2 = 22.5; 22.5/2 - 2 = 9.25. Thus, 47 is the wrong number.

AI explanation

The pattern subtracts 4 from each term and then divides the result by 2 to get the next term. Applying this, (844 - 4) / 2 = 420, (420 - 4) / 2 = 208, (208 - 4) / 2 = 102, and (102 - 4) / 2 = 49. The given term 47 is incorrect because the correct value should be 49. The wrong term in the series is 47.

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