5 items are filed under this topic.








Expressing the natural numbers in terms of 4 fours. 
20100119 

From Steve: When I was studying mathematics, there were several of us that tried to express the natural numbers in terms of 4 fours. Allowing the use of any known math operation, for example n to the zeroth power is 1.Is there more info on this exercise. This was done mentally, nothing written down. Answered by Robert Dawson. 





Four fours 
20091129 

From linda: Four Fours order of operations challenge i need problems using 4's only that have an answer of 13, 18, and 19
than you Answered by Penny Nom. 





Forming 10 from 4 fours 
20081106 

From Corderro: I need a answer for 10 using only the number 4 Answered by Penny Nom. 





Four fours 
20070823 

From Belinda: My son came home with a math question that I can figure out. He needs to use only the number 4 and only four 4's, no less no more.
The problems need the answers 11,13,14,and 18. He can use any mathematical sign except square root. He's been able to get all but these
so far and I've worked them, but can't come up with the problems. Can anyone help? Answered by Stephen la Rocque. 





37 with four 4'2 
20040103 

From Myra: Using four fours and only four fours to get an answer of 37. Answered by Claude Tardif. 


