How many 7's are there between 0 to 400?

• ans:80
  guys there will be 20 7's from 1-100
  7,17,27,37,47,57,67,87,97 and then 70,71,72,73,74,75,76,77(2 sevens),78,79
  and so on
  so ther will be 80 7's
  1-100=20
  100-200=20
  200-300=20
  300-400=20
• 10 years agoHelpfull: Yes(35) No(2)
• 0 to 100 there are 19-7.so for 400 19*4=76
• 10 years agoHelpfull: Yes(5) No(10)
• 80.
  1-100=20
  101-200=20
  201-300=20
  301-400=20
• 10 years agoHelpfull: Yes(5) No(0)
• solve through a.p
  
• 10 years agoHelpfull: Yes(2) No(5)
• from 0 to 100 20 7's are exist
  so for 400, 20*4=80
  
• 10 years agoHelpfull: Yes(2) No(0)
• 0 to 100 there are 11 7. so for 400 11*4=44
• 10 years agoHelpfull: Yes(1) No(12)
• answer is 40 bcz between 0-10 thereis only one 7 similarly 10-20,20-30,..90-100.
  so, for 0-100=10(7's)
  and for 0-400=40(10*4).
• 10 years agoHelpfull: Yes(0) No(9)