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Q: Which number would best complete the relation given below.? 21 : 36 : : 13 : ?
  • A. 23
  • B. 24
  • C. 22
  • D. 20
Correct Answer: Option D - Just as, 21 × 2 – 6 = 36 Same as, 13 × 2 – 6 = 20 So, ? = 20
D. Just as, 21 × 2 – 6 = 36 Same as, 13 × 2 – 6 = 20 So, ? = 20

Explanations:

Just as, 21 × 2 – 6 = 36 Same as, 13 × 2 – 6 = 20 So, ? = 20