What is the sum of the digits of the decimal form of the product 2^1999 * 5^2001?

• Ans :7
  =2^1999 * 5^2001
  =2^1999 * 5^1999*5^2
  =(2^1999 * 5^1999)*5^2
  =10^1999*25
  =25*10^1999
  =2500000000000000000---------------0
  =2+5+0+0+0--------------------------------+0
  =7
• 9 years agoHelpfull: Yes(0) No(0)