What are the primes under 100?

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Presentation transcript:

What are the primes under 100? 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97...

36 Factors, Multiples ...and Primes PRIME FACTOR DECOMPOSITION This is the process whereby a number is expressed as a product of its prime factors. Example: Express the following numbers as products of their prime factors. 36 36 60 24 770 36 = 2 x 2 x 3 x 3 = 22 x 32 2 18 2 9 3 3

60 Factors, Multiples ...and Primes PRIME FACTOR DECOMPOSITION This is the process whereby a number is expressed as a product of its prime factors. Example: Express the following numbers as products of their prime factors. 60 36 60 24 770 60 = 2 x 2 x 3 x 5 = 22 x 3 x 5 2 30 2 15 3 5

24 Factors, Multiples ...and Primes PRIME FACTOR DECOMPOSITION This is the process whereby a number is expressed as a product of its prime factors. Example: Express the following numbers as products of their prime factors. 24 36 60 24 770 24 = 2 x 2 x 2 x 3 = 23 x 3 2 12 2 6 2 3

770 Factors, Multiples ...and Primes PRIME FACTOR DECOMPOSITION This is the process whereby a number is expressed as a product of its prime factors. Example: Express the following numbers as products of their prime factors. 770 36 60 24 770 770 = 2 x 5 x 7 x 11 10 77 2 5 7 11

Factors, Multiples ...and Primes PRIME FACTOR DECOMPOSITION This is the process whereby a number is expressed as a product of its prime factors. Exercise: Express the following numbers as products of their prime factors. 16 40 56 100 38 108 34 16 = 24 40 = 23 x 5 56 =23 x 7 100 = 22 x 52 38 = 2 x 19 108 = 22 x 33 34 = 2 x 17

Factors, Multiples ...and Primes HCF using PRIME FACTORS