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Transcript
Write these numbers as a product of their prime factors:
Eg:
1
2
3
4
120
182
5
45
630
600
Remember: If a number ends in a 0, it divides by 10, if it ends in an even digit it divides by 2, if it ends in a
5 or a 0 it divides by 5 and if the digits add up to a multiple of 3, it divides by 3.
A prime has exactly two factors. The first 10 prime numbers are: 2 3 5 7 11 13 17 19 23 29
Product of their prime factors SOLUTIONS:
Eg:
1
2
3
4
120 = 2³ x 3 x 5
182 = 2 x 7 x 13
5
45 = 3² x 5
630 = 2 x 3² x 5 x 7
600 = 2³ x 3 x 5²
Remember: If a number ends in a 0, it divides by 10, if it ends in an even digit it divides by 2, if it ends in a
5 or a 0 it divides by 5 and if the digits add up to a multiple of 3, it divides by 3.
A prime has exactly two factors. The first 10 prime numbers are: 2 3 5 7 11 13 17 19 23 29