The purpose of this experiment is to see if the fingerprints of identical twins are also identical , or if they are more similar than the prints of regular siblings. I will examine the fingerprints of regular siblings, fraternal twins and identical twins.
http://scssi.scetv.org/mims/schools/blhs/science/y99/jessis1.htm
A magic square is an arrangement of the numbers from 1 to n^2 (n-squared) in an nxn matrix, with each number occurring exactly once, and such that the sum of the entries of any row, any column, or any main diagonal is the same. It is not hard to show that this sum must be n(n^2+1)/2.
http://mathforum.org/alejandre/magic.square.html
Let P be a lattice polygon. Assume there are I(P) lattice points in the interior of P, and B(P) lattice points on its boundary. Let A(P) denote the area of P. Then A(P) = I(P) + B(P)/2 - 1
http://www.cut-the-knot.org/ctk/Pick.shtml
Branch of Mathematics that studies the likelihood of occurrence of random events in order to predict the behavior of defined systems.
http://www.cut-the-knot.org/probability.shtml