Einstein

    Albert Einstein was born on March 14,1879, in Ulm, Germany. In his early years in education, he was a poor student, and many teachers thought he was retarded. He had many speech problems when he was nine years old. But many teachers didn't know that Albert was fascinated by the wondrous and confusing world around him. However, like many kids, he disliked school and ended his secondary education at age sixteen. He had gotten himself expelled by his bad attitude, and found a way to quit school without hurting his chances for university. He mastered many things, including calculus, the measurement of irregular shapes, and the form of math used to solve problems involving physics and engineering. However, Einstein quickly became infamous by his mathematical expression e=mc 2 because it was used to set off a bomb that destroyed Hiroshima, Japan. Albert Einstein died in Princeton,1955.

Pythagoras

                                       

                 Pythagoras, (A.K.A Pythagoras of Samos) , was a renowned Greek mathematician, mostly known for his invention of the Pythagorean Theorem, which consists of a square + b square = c square, indicating that two expressions equal a answer, also called a expression. The Pythagorean Theorem is well known through all of school, through all the grades, from the simple 2+2=4, to complicated geometry problems that even I can't solve . Pythagoras was an important mathematician, and contributed many important things to the world of math.

Cheryl Elisabeth Praeger

Cheyl Elisabeth Praeger was born on September 7, 1948 in Toowoomba, Queensland, Australia. She hasn't died yet which would make her 67.
Praeger's parents were named Eric and Queenie. They both had to leave school to earn their living. They didn't have a chance on participating in a higher education.
After leaving her school she enrolled in the Universety of Queensland, and got her B.Sc degree in 1969.                                                                                  2
Praeger studied the functional equation x (n+1)- x (n)= x   (n) + x(x(n) and x is an integer valued function of the integer variable, n, and found three parameter family of solutions.

My sources are here and here and here

A to Z Math

Here is my A to Z Math presentation.
Here is the resourse I used. (HERE)