242!
How many Zeros ?
a) 54
b) 58
c) 64
d) 72

• b) 58
  number of zeroes in 242! = [242/5] + [242/5^2] + [242/5^3] + [242/5^4]
  
  = 48 + 9 + 1 + 0
  = 58
• 10 years agoHelpfull: Yes(2) No(0)
• for finding number of zeroes we use to divide the number by a prime number until the numerator become less than the number... in this case number of 2s will be more so number of 5 will decide the number of zeroes
  now,
  242/5=48/5=9/5=1
  adding 48+9+1=58
• 10 years agoHelpfull: Yes(1) No(0)