ACT Math : Integers
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Example Questions
Example Question #1 : How To Multiply Odd Numbers
The product of two numbers is a negative odd integer. Which statement must be true about the numbers?
For the product of two numbers to be even, one number must be even. For the product of two numbers to be odd, both numbers must be odd.
Remember:
Example Question #1 : How To Subtract Even Numbers
Evaluate:
First solve by evaluating the ones digit. Carry over a 1 from the 
After the carry over, the 
Evaluate the tens digit.
Combine the tens digit and the ones digit.
The final answer is 
Example Question #11 : Even / Odd Numbers
Solve:
1. First subtract the ones digits:
So the ones digit will be a 0.
2. Next subtract the tens digit borrowing the 1 from the hundreds digit:
So the tens digit will be a 6.
3. Add the tens and ones digits together:
Example Question #3 : How To Subtract Even Numbers
Solve:
1. First subtract the ones digits borrowing a 1 from the tens digit:
So the ones digit will be a 6.
2. Next subtract the tens digit borrowing the 1 from the hundreds digit:
So the tens digit will be a 8.
3. Next add the hundreds, tens and ones digits together:
Example Question #1 : How To Add Even Numbers
Which of the following expressions is odd for any integers 
All the expressions can be even for some combination of 
The key here is for any integers 
Example Question #1 : How To Add Even Numbers
Evaluate:
For this problem, align and solve by adding the ones digit 
Example Question #2 : How To Add Even Numbers
Find the sum of 12 and 42.
Rewrite the question into a mathematical expression.
Add the ones digit.
Add the tens digit.
Combine the tens digit and the ones digit. The answer is 
Example Question #12 : Even / Odd Numbers
Solve:
This problem can be solved using common factors.
Rewrite 
Example Question #13 : Even / Odd Numbers
Divide:
Rewrite 
Example Question #14 : Even / Odd Numbers
Divide:
Rewrite 
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