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WBCS Preliminary Examination 2019 — General Studies · Question 158 of 200

Q158
ReasoningAlphabet, Letter Series & Word Formation
If the first and third letters in the word NECESSARY were interchanged, also the fourth and sixth letters, and the seventh and ninth letters, which of the following would be the seventh letter from the left?
  1. a.A
  2. b.Y
  3. c.R
  4. d.E

Answer: (B) Y

NECESSARY has letters N-E-C-E-S-S-A-R-Y at positions 1-9. Swapping positions 1&3 (N and C) gives CEN ESSARY; swapping positions 4&6 (E and S) gives CENSS EARY; swapping positions 7&9 (A and Y) gives CENSSEYRA. Reading off the 7th letter from the left in this new arrangement gives Y.

Q157 Whole paperQ159