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Vedic multiplication or waving multiplication. Fibonacci's Sieve or Lattice Multiplication. John Napier's Bones multiplication.

Proving The Well Ordering Principle is equivalent to The Principle of Mathematical Induction.

Principle of Strong Mathematical Induction. Fermat's Method of infinite descent. Well Ordering Principle.

Prove Inequality using the Method of Mathematical Induction.

Please visit us at http://www.isallaboutmath.com Explain the Method of Mathematical Induction. Francesco Maurolico, Pascal and John Wallis. Applying the method of Induction to prove the sum of odd numbers is a square.

Visit us at http://www.isallaboutmath.com/. We explain the summation telescoping property and apply it to finding two summations.

Please visit us at http://www.isallaboutmath.com Sigma Notation. Tetrahedral numbers. Pyramidal Numbers. Some relations between them.

Please visit http://www.isallaboutmath.com Recursive Relation for triangular numbers. Finding a solution to the recursive equation and another solution to the Recursive equation.

Visit us at http://www.isallaboutmath.com Using Gauss Idea to find the sum 1+2 + ... +n. Arithmetic progressions an obtaining a general formula for the sum of an arithmetic progression. Please visit http://www.isallaboutmath.com

Visit us at http://www.isallaboutmath.com Elementary explanation of triangular numbers and Gauss demonstration for the sum of the first 100 natural numbers.