How do you list all the factors of 70?

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Answer 1 · 2018-07-03T17:43:27

List in their pairs

1 & 70
2 & 35
5 & 14
7 & 10

I don't need to check between the numbers 10, 14, 35 and 70 because I have the factors in pairs.

Answer 2 · 2018-07-03T17:46:19

Another way is to use prime factors

$70 = 2 \times 5 \times 7$ $70=2xx5xx7$

2 and 35, 5 and 14, 7 and 10 plus 1 and 70

Answer 3 · 2018-08-09T19:49:44

$1, 2, 5, 7, 10, 14, 35, 70$ $1,2,5,7,10,14,35,70$

Write a number as the product of its prime factors.

$70 = 2 \times 5 \times 7$ $70 = 2xx5xx7$

$1$ $1$ is a factor of all numbers.

Find all the factors by grouping the factors:

One at a time:

$1, 2, 5, 7$ $1, 2, 5, 7$

Two at a time:

$2 \times 5 = 10, 2 \times 7 = 145 \times 7 = 35$ $2xx5=10," "2xx7=14" "5xx7 =35$

Three at a time:

$2 \times 5 \times 7 = 70$ $2xx5xx7 =70$

The eight factors of $70$ $70$ are:

$1, 2, 5, 7, 10, 14, 35, 70$ $1,2,5,7,10,14,35,70$