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.(Hint: 16 X 11 = 176, which is a factor.)The number=2x2x2x2x3x3x3x3x3x7x7x11 =2095632 Factors greater than hundred:2095632/2=10478162095632/3=6985442095632/4=523908Since all these factors are greater than 100, they are the answers.Textbook p9 #26:The Prime factorisation of two numbers are 2 X 3^2 X 7^3 X 13 and3 X 7^2 X 13^3 X 17 .Write down 3 common factors of the numbers.1st number=2x3x3x7x7x7x13 =802622nd number=3x7x7x13x13x13x7 =2260713Common factors: 3,7,13
Tuesday, January 26, 2010
22 Jan (01): Prime Factorisation (continues...)
Posted by Sher Li at 7:50 PM
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