Serving the Quantitative Finance Community
The Four Fours Challenge
Here's a nice little exercise.How many whole numbers in the range 0-150 can be expressed using only the number "4" and basic mathematical operations?The rules:1) The only allowable number is 4, and it must appear exactly four times.2) Allowed operations are: addition and subtraction multiplication and division brackets and powers the factorial operatorExample: 48 = (4*4 - 4)*4 and 63 = (4^4 - 4)/4I have what I believe is a complete solution, which I will post in a few days.... enjoy!
Last edited by Robertg on April 2nd, 2007, 10:00 pm, edited 1 time in total.