How to subtract even numbers - GRE Quantitative Reasoning
Card 0 of 3
Assume 
and 
are both even whole numbers and 
.
What is a possible solution for 
?
Assume
What is a possible solution for
Since 
, 
must result in a positive whole number. The only answer that fits these requirements of being both positive and whole number is 
.
Since
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Choose the answer below which best solves the following equation:
Choose the answer below which best solves the following equation:
If it's simpler for you, you can split this problem into two parts: First, take 
away from 
, and you're left with 
. Then, take away 
from 
(you can even count backwards if necessary), and you'll be left with the final answer, 
.
If it's simpler for you, you can split this problem into two parts: First, take
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A bus has sixteen passengers at its first stop. It drops off three at the second stop, and three at the third stop. At the fourth stop, eveyone else gets off the bus. How many people got off at the fourth stop?
A bus has sixteen passengers at its first stop. It drops off three at the second stop, and three at the third stop. At the fourth stop, eveyone else gets off the bus. How many people got off at the fourth stop?
First, add the total number of passengers that got off BEFORE the fourth stop. Three plus three is six, so you know that you've lost six total passengers before the fourth stop. 
, so there are ten passengers remaining at the fourth stop, and that's how many get off there.
First, add the total number of passengers that got off BEFORE the fourth stop. Three plus three is six, so you know that you've lost six total passengers before the fourth stop.
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