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   GRE Number Properties
Section 1: Number Rules
Section 2: Consecutive Numbers
Section 3: Divisibility
Section 4: Fractions
Section 5: Decimals
Section 6: Exponents
Section 7: Roots & Radicals
Section 8: Extra Questions

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   GRE Number Properties 2: Consecutive Numbers
Table of Contents  
 

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 GRE says "inclusive" it means that they are counting the first and the last of a given set. Sometimes the GRE 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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  Contents of Number Properties Chapter:
  Section 1: Number Rules
  Section 2: Consecutive Numbers
  Section 3: Divisibility
  Section 4: Fractions
  Section 5: Decimals
  Section 6: Exponents
  Section 7: Roots & Radicals
  Section 8: Sample Questions
 
Divisibility

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