numbers

Did you know that for 76 raised to the power of n, where n is an element of Natural numbers, the last 2 digits is always 76!

76¹ = 76

76² = 5776

76³ = 438976

76⁴ = 33362176

76⁵ = 2535525376 

tutorial on number of factors

To find the number of factors of a number

If a number N can be expressed as product of prime factors such that

N = p^a x q^b x r^c...............................

Then, the total number of factors including N and 1 is given by

(a + 1)x(b + 1)x(c + 1).................................

Example:

Find the total number of factors of 222.

222 = 2 x 3 x 37

Or, 222 = 2¹ x 3¹ x 37¹

So, the total number of factors = (1+1)x(1+1)x(1+1) = 2x2x2 = 8

We can check the answer as shown below.

The factors of 222 are 1, 2, 3, 6, 37, 74, 111, 222.

Find the total number of factors of 64.

64 = 2⁶

So, the total number of factors = (6+1) = 7

We can check the answer as shown below.

The factors of 64 are 1, 2, 4, 8, 16, 32, 64.

addition and subtraction of fraction STD III and STD IV

video tutorial on addition and subtraction of fraction.

excellent tutorial

http://www.mathtutor.ac.uk/arithmetic/fractiomsaddingandsubtracting/video

basics of fraction for STD III - video tutorial

I feel this is a very good video tutorial on fraction.

http://www.mathtutor.ac.uk/arithmetic/fractionsbasicideas/video

introduction to fractions for STD III

magic square tutorial

3 x 3 magic Square. Very nicely presented. The video could have been more clear, but whatever can't take away the credit from our young friend.

tutorial on Rationalizing Denominators using conjugates

Rationalizing Denominators using conjugates

tutorial on rationalization of denominator

tutorial on rational and irrational numbers

tutorial -- types of numbers

video on natural, whole, integer and other types of number

tutorial - Prime numbers, the sieve of Eratosthenes,

Prime numbers, the sieve of Eratosthenes, very nice tutorial 

tutorial on Prime and composite number

A nice tutorial on Prime and composite number

tutorial square of any number using vedic maths

This tutorial is about finding  find the square of a number using vedic maths.

vedic mathematics --- perfect cube of 2 digit number

Very good tutorial on finding the perfect cube of any 2 digit number.

Tutorial - how to deal with brackets

6 to 7 years of schooling

http://www.youtube.com/watch?feature=player_embedded&v=eHqdcz4pjwE

tutorial - complete the perfect square

for students with 6-7 years of schooling

http://www.youtube.com/watch?feature=player_embedded&v=5WBXhszflR8

tutorial -multiplying 2 binomials

for students with 6-7 years of schooling

http://www.youtube.com/watch?feature=player_embedded&v=pBFIXFwneoM

Tutorials - how to multiply several terms at a time

for students with 6-7 years of schooling

http://www.youtube.com/watch?feature=player_embedded&v=zs6IymmSRrA

tutorials - how to multiply monomials

for students with 6-7 years of schooling

http://www.youtube.com/watch?feature=player_embedded&v=3NgJ1pW8CAY

Tutorial - adding and subtraction of monomials

for students with 6-7 years of schooling

http://www.youtube.com/watch?feature=player_embedded&v=1tfVF9nirEM