Lesson: Challenging Arithmetic - 05
Factor Tree
[Page 5 of 30]
Factor Trees are useful for listing all of the prime factors of a given number.
To make a factor tree, start with any factor pair for a given number.
Keep dividing the factors until the only numbers remaining are prime numbers:
Video Lesson - How to Find Prime Factors by Factor Tree
The prime factors of 330 are 2, 3, 5 and 11.
Practice this until you're able to factor quickly and easily into primes.
Video - Factor Tree
Prime Numbers
The number which is divisible only by itself or 1 is a prime number. Example: 2, 3, 5, 7, 11, and 13 are some of the prime numbers.
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Test Prep Lessons With Video Lessons and Explained MCQ
Large number of solved practice MCQ with explanations. Video Lessons and 10 Fully explained Grand/Full Tests.
Each exam has different types of math sections. The sections may be called Mathematics or Arithmetic Problem Solving. In the math section of the exam, you will be tested on basic math skills such as addition, subtraction, multiplication, and division. Some sections may include fractions, decimals, graphs and percentages. All questions will be a multiple choice format. The amount of math questions on each test will vary.