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WBCS Preliminary Examination 2019 — General Studies · Question 165 of 200

Q165
ArithmeticAlgebra, Equations & Operations
Which of the following interchanges of numbers would make the given equation correct? $8 \times 20 \div 3 + 9 - 5 = 38$
  1. a.3, 8
  2. b.8, 9
  3. c.3, 5
  4. d.3, 9

Answer: (C) 3, 5

Swapping the 3 and the 5 gives $8 \times 20 \div 5 + 9 - 3 = \dfrac{160}{5} + 9 - 3 = 32 + 6 = 38$, which matches the required result.

Q164 Whole paperQ166