The integers from 1 to 1000 are written in order around a circle. Starting at 1, every…

Mathematics · JEE Advanced · NTA ExamsPermutations and Combinations

The integers from 1 to 1000 are written in order around a circle. Starting at 1, every fifteenth number is marked (that is 1, 16, 31, etc.) This process is continued until a number is reached which has already been marked, then unmarked numbers are
  1. 200
  2. 400
  3. 600
  4. 800

Answer

(D) 800

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