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Directions: The questions are based on the 5 four-digit numbers given below. 2764 7983 9862 5493 6278 If in each number, all the composite digits are changed to their just previous prime number and all the prime digits are changed to their just next composite number then how many times '7' is repeated in the new sequence?

Options

  1. A6
  2. B5
  3. C4
  4. D7

Correct answer

A. 6

Step-by-step solution

Given Sequence: 27 64 7 98 3 986 2 5 49 3 6 27 8 New Sequence: 4853 8774 7754 6374 5487 Here '7' is repeated 6 times in the new sequence. Note- Prime digits are colored with bold red and Composite digits are bold black. Hence option A is correct.

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