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  9. Q47

UKPSC PCS 2012 · Question 47 of 78

Form the product S = 1 × 2 × 3 × 4 × 5 × 6 × 7 × 8 × 9 × …….. × 50 Counting from unit’s place, the number of zeros in S is :

Quant

  1. A10
  2. B11
  3. C12Correct
  4. DNone of these

Answer: C. 12

Explanation

Trailing zeros in 50! = floor(50/5)+floor(50/25) = 10+2 = 12.

Source: UKPSC 2012 Prelims CSAT Paper-II (adda247/studyfry PDF), exam held 30 Nov 2014

← Q46View full paper (78 questions)Q48 →

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