Consecutive numbers are a set of numbers in which each member of the set is the successor of its predecessor.
4, 6, 8, 10
even consecutive numbers
3, 5, 7, 9
odd consecutive numbers
3, 5, 7, 11, 13
prime consecutive numbers:
Beware of "inclusive questions"
When the GMAT says "inclusive" it means that they are counting the first and the last of a given set. Sometimes the GMAT doesn't even say "inclusive" and it is implied in the question.
How many numbers are there from 2 to 6?
Normally you think to subtract. 6 - 2 = 4. But, try counting the numbers from 2 to 6. 2, 3, 4, 5, 6. The answer is 5.
Example
A fence consists of a fence post (1 foot wide) and a bridge connecting each post that is 9 feet long. How many fence posts would be required for a 100 foot fence?
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