What is the unit digit of the product of all non even prime numbers between 1 and 100?

• Taking 4 hrs to answer your own question !
• 12 years agoHelpfull: Yes(5) No(2)
• ans is 5
  as we know when we multiply 5 with any no it gives unit digit as o or 5
  5*even=0(unit)
  5*odd=5(unit)
  so
  we have only odd nos which are also prime, so the ans is 5.
  correct me if i m wrong.
• 12 years agoHelpfull: Yes(3) No(0)
• 3*5*7*11*13*............ WILL HAVE 5 AT ITS UNIT PLACE.SO ANSWER=5
• 12 years agoHelpfull: Yes(1) No(5)
• @ JYOTISH
  no need to answer the questions of u'r own
• 12 years agoHelpfull: Yes(1) No(0)
• Non-Even Prime Numbers are 3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97
  so, 1*3*5*7*9=945
  so 5 is the unit digit
• 12 years agoHelpfull: Yes(0) No(0)