what will be the sum of digits of 5^2010

• 5^2=25 sum of digits=7=3×2+1
  5^4=625 sum of digits=13=3×4+1
  Similarly 5^2010=3×2010+1=6031.
  This rule holds for even powers of 5.
  
• 9 years agoHelpfull: Yes(65) No(2)
• sum of digits shows the following trend
  5^1=5
  5^2=7
  5^3=8
  5^4=4
  5^5=2
  5^6=3
  and then it repeats itself
  it means trend repeat itself after every 6 power
  also 2010 is divisible by 6 so the sum of digits is 3
  
  
  hence answer is 3
  
• 10 years agoHelpfull: Yes(3) No(24)
• I think it shud be solved by gp
• 9 years agoHelpfull: Yes(0) No(0)