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1. How many numbers from 11 to 50 are there which are exactly divisible by 7 not by 3?

  • A. 6
  • B. 6
  • C. 6
  • D. 6

Answer: Option C

Explanation:

Speed of the train = 650/65 = 10 mps.
Speed of the man = 10/6 = 5/3 mps.
Time for the man to cross the platform = 240/(5/3) = 144 seconds = 2 minutes 24 seconds. Ans: D

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