Question

Question #016b1

Answer 1

`x >9`

Explanation:

Let the number be `x`

Four more than the number is `x+4`

The answer to the addition must be more than `13`

`x+4 > 13`

`x > 13-4`

`x >9`

So as long as you choose a number which is more than 9, when 4 is added, the result will always be more than 13.

Check:
Let `x = 11" " 11+4 = 15 and 15 >13`
Let `x = 9" " 9+4 = 13, " but " 13 = 13`

So, `9` does not work, but a number more than 9 will.