\u201cDaddy, I\u2019d like to have the little red bicycle you see in the shop window over there,\u201d Lenny said pointing, as they were taking a walk along the avenue.<\/p>\n
\u201cSure, Lenny,\u201d said daddy, \u201cIf you can solve a little puzzle, I\u2019ll buy it for you right away.\u201d<\/p>\n
\u201cYippee, daddy,\u201d said Lenny enthusiastically, jumping up and down, \u201ctell the puzzle to me right away.\u201d<\/p>\n
\u201cTake the number 3 and multiply it by itself 999 times. Then tell me the last digit of the resulting number, Lenny?\u201d<\/p>\n
\u201cHmm\u2026,\u201d said Lenny. \u201cLet\u2019s sit down on that park bench so I can figure it out.\u201d<\/p>\n
\u201cOk, Lenny, take your time,\u201d said daddy.<\/p>\n
Lenny sat on the bench with daddy for some minutes with a very concentrated look on his face. Then he brightened up and said \u201cI\u2019ve got the answer, daddy.\u201d<\/p>\n
As the answer was correct, they went to the bicycle shop and Lenny came out riding the little red bicycle with a big smile on his face.<\/p>\n
What would you say is the last digit in the number resulting from multiplying 3 by itself 999 times?<\/em><\/p>\nShare this:<\/h3>