|Exercise Name:||Prime factorization|
|Math Missions:||Pre-algebra Math Mission, Mathematics I Math Mission|
|Types of Problems:||1|
Types of Problems
There is one type of problem in this exercise:
- Factor the given number: The problem asks the user to factor a given number.
Knowledge of solving prime factorization problems are essential to ensure success in this exercise.
- Students should remember to use factor trees if it's easier for them to visualize, and they can watch the corresponding video if they need help.
Another helpful strategy is to perform a divisibility test. Divisibility tests are quick arithmetic operations used to determine whether a given number is divisible by a prime number.
|Rule||the last digit is divisble by 2||the sum of the digits are divisible by 3||the last digit is either 0, or 5||if 2 times the last digit minus the rest is divisible by 7|
|Example||7648 is divisible by 2, since
8 is divisible by 2
|732681 is divisible by 3, since 7+3+2+6+8+1=27 is divisible by 3||675 is divisible by 5, since the last digit is 5||189 is divisible by 7, since 18-2*9=0 is divisible by 7|
- Problems like this will appear on standardized tests like the SATs and ACTs.