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WBCS Preliminary Examination 2016 — General Studies · Question 166 of 200

Q166
ReasoningAlphabet, Letter Series & Word Formation
How many 9s are sandwiched between 6 and 7 in 6969966769796697796667?
  1. a.2
  2. b.3
  3. c.4
  4. d.5

Answer: (C) 4

Identifying pairs where 9 is between 6 and 7 (i.e., pattern 6-9-7 or 7-9-6): scanning the sequence ...6|9|6|9|9|6|6|7|6|9|7|9|6|6|9|7|7|9|6|6|6|7... There are 4 nines sandwiched between 6 and 7. The source key gives (C) 4.

Q165 Whole paperQ167
How many 9s are sandwiched between 6 and 7 in 6969966769796697796667? — WBCS Preliminary Examination 2016 Q166 | Prostuti360°