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  1. What is the digit in the unit’s place in the number 15!/100 .
    1. 5
    2. 7
    3. 3
    4. 0
Correct Option: D

15! = 15 × 14 × 13 × 12 × 11 × 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1
Number of 5’s = 3
Number of 2’s = More than 3
∴ Number of zeroes in the product = 3

∴ Unit’s digit in =
15!
= 0
100



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