
Skip to Navigation about Plus support Plus Plus sponsors subscribe to Plus terms of use Search this site : 2011 in fours solution Submitted by mf344 on November 1, 2011 Write the number 2011 using only the digit 4 and the operations of addition , subtraction , multiplication , division , exponentiation , taking a square root and factorial . You can use any number composed of the digit 4, even if it's decimal , so 44 and 44.44 are both allowed . You're also allowed to use brackets . : Solution 444 x 4 4 x 4 4 4 4 2011. This puzzle was contributed by Paulo Ferro , a maths teacher in Oporto , Portugal . For more of Paulo's puzzles , visit his website in English or Portuguese If you have a puzzle you think might interest Plus readers , please email us Back to original puzzle Add new comment