I have written down some number properties. Just wondering if they're helpful in any way for the gmat.
1. For an odd number of consecutive numbers in a set, the sum is always a multiple of the number of items.
2. For an even number of consecutive numbers in a set, the sum is never a multiple of the number of items.
3. If you add or subtract multiples of an integer, you get another multiple of that integer.
4. Add a multiple of N to a non-multiple, result is non-multiple.
5. Add 2 non multiples of N and the result could be either multiple or non-multiple.
Just wondering if you guys have ever used any of these properties during your GMAT or practice exams. Thanks.
1. For an odd number of consecutive numbers in a set, the sum is always a multiple of the number of items.
2. For an even number of consecutive numbers in a set, the sum is never a multiple of the number of items.
3. If you add or subtract multiples of an integer, you get another multiple of that integer.
4. Add a multiple of N to a non-multiple, result is non-multiple.
5. Add 2 non multiples of N and the result could be either multiple or non-multiple.
Just wondering if you guys have ever used any of these properties during your GMAT or practice exams. Thanks.
