Multiple choice

Direction: Select the number which is wrong according to the given number series pattern: 7, 8.3, 10.9, 14.8, 21.7, 26.5, 34.3

  1. 8.3

  2. 14.8

  3. 21.7

  4. 26.5

  5. 34.3
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C Correct answer
Explanation

The differences are: 1.3, 2.6, 3.9, 6.9, 4.8, 7.8. The pattern of differences should be multiples of 1.3 (1.3, 2.6, 3.9, 5.2, 6.5, 7.8). Replacing 21.7 with 20.0 (14.8 + 5.2) makes the sequence consistent.

AI explanation

This series uses a pattern of consecutive prime numbers added to each term: 7 + 1.3 = 8.3, 8.3 + 2.6 = 10.9, and so on. Following this logic, the fifth term should be calculated as 14.8 + 7.4 = 22.2. Since 22.2 is the correct number, the given term 21.7 is the wrong number.

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