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TGPSC Group-I 2023 · Question 136 of 136

What is the sum of all 2 - digit numbers in the following series ? 1, 8, 15, 22, ....

Mental Ability

  1. A750
  2. B759
  3. C741Correct
  4. D742

Answer: C. 741

Explanation

Two-digit terms 15…99 (13 terms): sum = 13/2 × (15 + 99) = 741.

Source: TGPSC Group-I Preliminary Test 2023 official question paper (held 11 Jun 2023)

← Q135View full paper (136 questions)

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