How to divide odd numbers - ACT Math
Card 0 of 3
Choose the answer which best solves the equation below:
Choose the answer which best solves the equation below:
There are two ways to solve this problem. First you can do so algebraically by dividing both sides by 13:
But, there is another way, which if you understand odd numbers, is even faster. Of all the answers above, only one is odd. You know, given the equation, that 
must be odd--any odd number multiplied by an odd number will yeild an odd number. If you multiply an odd number by an even number, you will get an even number.
There are two ways to solve this problem. First you can do so algebraically by dividing both sides by 13:
But, there is another way, which if you understand odd numbers, is even faster. Of all the answers above, only one is odd. You know, given the equation, that
Compare your answer with the correct one above
Solve for 
in the following equation:
Solve for
There are two ways to approach this problem:
1. Use the rule that states that any two odd numbers multiplied together will yield another odd number.
Using this rule, only one answer is an odd number (29) which will yield another odd number (493) when multiplied by the given odd number (17).
2. Solve algebraically:
There are two ways to approach this problem:
1. Use the rule that states that any two odd numbers multiplied together will yield another odd number.
Using this rule, only one answer is an odd number (29) which will yield another odd number (493) when multiplied by the given odd number (17).
2. Solve algebraically:
Compare your answer with the correct one above
Solve for 
in the follwing equation:
Solve for
There are two ways to approach this problem:
1. Use the rule that states that any two odd numbers multiplied together will yield another odd number.
Using this rule, only one answer is an odd number (85) which will yield another odd number (7,735) when multiplied by the given odd number (91).
2. Solve algebraically:
There are two ways to approach this problem:
1. Use the rule that states that any two odd numbers multiplied together will yield another odd number.
Using this rule, only one answer is an odd number (85) which will yield another odd number (7,735) when multiplied by the given odd number (91).
2. Solve algebraically:
Compare your answer with the correct one above