how many numbers are there whose factorial ends with 17 zeros
a)6 b)5
c)0 d)11

• answer c :)
  checking no. of zeros
  =70/5 + 70/25 = 14+ 2 =16 zeros
  =75/5 + 75+25 = 15 + 3 = 18 zeros
  similarly 71,72,73,74 have 16 zeros
  and after 75! have more than 18 zeros..
  so there is no number ...
• 10 years agoHelpfull: Yes(51) No(1)
• answer =option C)0
  70!=ends with 16 zeros
  so as 71!,72!,73!,74! ends with 16 zeros
  but 75! ends with 18 zeros
  so there is no number possible whose factorial has 17 zeros at end
  
• 10 years agoHelpfull: Yes(23) No(1)
• in 70! number of zero=14+2=16
  in75! zero=15+3=18
  so 17 zero in factorial no number available
• 10 years agoHelpfull: Yes(5) No(1)
• it's simple called factorial jump which happens at 25 50 75 100 ..... u beeter remeber these fundas
• 10 years agoHelpfull: Yes(1) No(8)
• the formula for finding number of zeros in n! is
  
  [n/5]+[n/5^2]…[n/5^r]
• 10 years agoHelpfull: Yes(0) No(2)
• lets 5!=ends with one zero
  6!,7!,8!,9! also ends with one zero (czee these are multipli in 5!).
  10!=ends with double zero.
  so,
  ends with one zero=5 (such number)
  so that after every 5 numbers one zero add.
  option (b) ans
• 8 years agoHelpfull: Yes(0) No(0)