What is the digit in the tens place when 7^2005 is expressed in decimal notation?
7^2005 % 10^10 =6088416807 - The tens digit is "zero".
can you explain a little bit more how you got that?
7^2005 = 2.6397951619824450567257574123295e+1694
If you raise 7 to power of 2005 you get the above number, which is 1695 digits long! And the last 10 digits of it are ..........6,088,416,807.