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WBCS Preliminary Examination 2023 — General Studies · Question 64 of 200

Q64
ArithmeticNumber Series & Progressions
In the following "date" series, what will come in the next? 18-07-2002, 25-07-2002, 02-08-2002, 11-08-2002
  1. a.20-08-2002
  2. b.21-08-2002
  3. c.19-08-2002
  4. d.22-08-2002

Answer: (B) 21-08-2002

The gaps between successive dates grow by one day each time: 18 July to 25 July is 7 days; 25 July to 2 August is 8 days (July has 31 days); 2 August to 11 August is 9 days. The next gap must be 10 days, and 11 August + 10 days = 21-08-2002. The usual slip is to forget that July has 31 days when counting across the month-end. Months with 31 days: January, March, May, July, August, October and December.

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