ACT Math : How to add odd numbers
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Example Questions
Example Question #1 : Even / Odd Numbers
Solve:
Add the ones digits:
Since there is no tens digit to carry over, proceed to add the tens digits:
The answer is 
Example Question #2 : Even / Odd Numbers
At a certain high school, everyone must take either Latin or Greek. There are 
If there are 
Example Question #3 : Even / Odd Numbers
Find the sum of 13 and 19.
Rewrite the question in a mathematical expression.
Add the ones digit.
Since this number is larger than 
Add the tens digit with the carry over.
Combine the tens digit and the ones digit. The answer is 
Example Question #4 : Even / Odd Numbers
In order to get an odd result from an addition, we must have one odd and one even number, thus you know from the first point about 
Now, if we presume that 
First of all, you can eliminate the two answers that say that a given value is positive or negative. This cannot be told from our data. Next, it cannot be the case that 
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