I have put eight four-digit numbers together in a 4x4 grid, such that four can be read across and four downwards.

Four of my numbers are odd and four are even. I have one cubed number going across and one going down, and I have one fourth-power number going across and one going down. Two of the other numbers in the grid are squares.

Which two numbers in my grid are not perfect powers?

(In reply to Solution by Hand by Lisa)

Lisa, today is Monday and here in Brasil is 9:20 A.M.

I woke up decided to solve this problem by hand, as you did, since in the weekend I didnīt have time.

I was thinking to start like you did : first, obviously, the fourth powers, that are few that possibly fits, etc...

Good work, again !! Congratulations.

 

Posted by pcbouhid on 2005-07-11 14:00:24