If  15 × 14 × 13 ×…………× 3 × 2 × 1 = 3^m × n, where m and n are positive integers, then what is the maximum value of m? 

(UPSC CSAT – 2022)

  1. 7
  2. 6
  3. 5
  4. 4

Solution: Ans.(b)

Power of 3 in 15!

[15/3] = 5

[5/3] = 1

Power of 3 is = 5+1 = 6

Maximum value of m is 6

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