Recently Replied Questions

• Find the sum
  \frac{4}{19}+\frac{44}{19^2}+\frac{444}{19^3}..........\infty ...
  0·1· #Mathematics#Algebra
  replied2010-01-19 03:48:53
• RMO Question..
  Prove that x9999+x8888+x7777+.....+x1111+1 is divisible by x+1 ...
  0·6· #Mathematics#Olympiad Stuff
  replied2009-07-19 04:36:24
• RMO Question..
  Prove that x9999+x8888+x7777+.....+x1111+1 is divisible by x+1 ...
  0·6· #Mathematics#Olympiad Stuff
  replied2009-07-19 04:32:37
• easier one...
  Prove that for all n\ge1 , 1+5^n+5^{2n}+5^{3n}+5^{4n} is composite ...
  0·17· #Mathematics#Olympiad Stuff
  replied2009-07-17 21:30:01
• Good one..
  Let A be the sum of the digits of the number 4444^{4444} , and B the sum of the digits of A. Compute the sum of the digits of B. ...
  0·12· #Mathematics#Olympiad Stuff
  replied2009-07-17 08:22:04
• Good one..
  Let A be the sum of the digits of the number 4444^{4444} , and B the sum of the digits of A. Compute the sum of the digits of B. ...
  0·12· #Mathematics#Olympiad Stuff
  replied2009-07-17 06:22:08