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  9. Q130

TGPSC Group-I 2022 · Question 130 of 140

Identify the wrong fraction in the following series : 2/3, 4/7, 7/13, 12/23, 16/31, 22/43

reasoning

  1. A22/43
  2. B12/23Correct
  3. C16/31
  4. D7/13

Answer: B. 12/23

Explanation

Series: 2/3, 4/7, 7/13, 12/23, 16/31, 22/43. Numerators: 2,4,7,12,16,22 — differences 2,3,5,4,6. Denominators: 3,7,13,23,31,43 — differences 4,6,10,8,12. If the 4th term were 11/21, differences would be 2,3,4,5,6 and 4,6,8,10,12 (arithmetic). So 12/23 is the wrong fraction. Answer: (2).

Source: TGPSC Group-I 2022 Prelims (Master Paper, Notification No. 04/2022)

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