# Math Help - Not sure how to attack this

1. ## Not sure how to attack this

Hi all,

Given this question and I am lost as to what it means. Any help would be appreciated.

Let a = 68, b = 33, and n = 3,

a. Verify that 3 | ( 25 – 19 ).

Thanks

2. Hello,

3 | (25-19) means that 3 divides (25-19), or in other words that 25-19 is a multiple of 3.

3. This simply would mean that 6 is a multiple of 3. A statement like 3 | (25-18) would then be incorrect, and would not be written this way.

Thanks heaps

4. Originally Posted by Joel
This simply would mean that 6 is a multiple of 3. A statement like 3 | (25-18) would then be incorrect, and would not be written this way.

Thanks heaps
That's exactly it !

In this case, we may write $3\nmid (25-18)$