Decimals

A factor of a number can be divided exactly into it, with no remainder. This is useful when 'simplifying' fractions.

When a number is divided by one of its factors, the answer is a whole number. The factor divides the whole number exactly; there is no remainder.

Note: The number itself and 1 are always factors.

Numbers
Factors
246
2, 3, 6, 41, 82 and 123
390
2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, and 195
70
2, 5, 7, 10, 14 and 35

Look at the first example in the table and note:

246 is divided by 2 to get 123 with no remainder - 2 is a factor of 246
246
is divided by 3 to get 82 with no remainder - 3 is a factor of 246
246
is divided by 4 to get 61 with a remainder of 2 - 4 is NOT a factor of 246
246
is divided by 6 to get 41 with no remainder - 6 is a factor of 246

Task 16