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Question 11Asked in DSSSB TGT Computer Science, 24 Jun 2023, Shift 3 (4:30 PM)

Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the one that is different.

  1. A13 - 39
  2. B27 - 81
  3. C23 - 69
  4. D17 - 51
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Correct answer: (B) 27 - 81

Explanation

In every pair the second number is 3 times the first, but in 13, 23 and 17 the first number is prime. 27 is not prime (both 27 and 81 are powers of 3), so 27 - 81 is the odd pair.

From DSSSB TGT Computer Science PYQ, 24 Jun 2023, Shift 3 (4:30 PM)

This is question 11 of DSSSB TGT Computer Science PYQ, 24 Jun 2023, Shift 3 (4:30 PM). See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.