### Monday, 25 January 2010

## Prime No.s (2)

**:**

*Textbook p9 #25*The Prime factorisation of a number is 2^4 X 3^5 X 7^2 X 11.

Write down 3 factors of the number that are greater than 100.

2x7x11=154

3x5x7=105

7x3x11=231

*:*

**Textbook p9 #26**The Prime factorisation of two numbers are 2 X 3^2 X 7^3 X 13 and 3 X 7^2 X 13^3 X 17 .

Write down 3 common factors of the numbers. 3,7,13

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