## Average deviation

If a single number, m, is removed from 1, 2, 3, …, n, the average value becomes 40.75.

Find m and n.

This is pretty easy, but requires some thought.

Archive for November, 2013

Find m and n.

This is pretty easy, but requires some thought.

Completely solve n^2 + 20n + 11 = m^2 for integer m, n.

This is very easy if you use the right trick.

Posted by ragknot under Tom (9 Responds)

Not Math?

Well, maybe a little? The Trick of Mind solution will be to “Name a specific world’s country. A while back, I asked ToM an Easy and True solution about the Colebrook-White with six different equations. A Web site for the county’s computation asked me if they could publish the solution. [...]