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Prime factorization
Prime factorization 256
Description
Exercise Name: Prime factorization
Math Missions: Pre-algebra Math Mission, Mathematics I Math Mission
Types of Problems: 1

The Prime factorization exercise appears under the Pre-algebra Math Mission and Mathematics I Math Mission. This exercise helps the user understand the factoring of individual numbers.

Pf1

Types of Problems

There is one type of problem in this exercise:

  1. Factor the given number: The problem asks the user to factor a given number.

Strategies

Knowledge of solving prime factorization problems are essential to ensure success in this exercise.

  1. 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.

prime 2 3 5 7
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

Real-life Applications

  1. Problems like this will appear on standardized tests like the SATs and ACTs.

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