The Devil's Riddle

Why Was The Devil's Riddle Solved Immediately? John died, he went to hell and the Devil asked him a random question to allow him a last chance to avoid hell (following the rules under section 6.5 of paragraph 7) What is the last digit of 5 to the power of 103547358836? John, thought for a while and then he answered: "..." Devil immediately was disappeared inside a huge flame, and John returned on Earth. Scroll down to see what is the solution: Answer: 5, It will always be 5 for any exponent of 5 different than 0, since 5^0=1.