Lesson: Challenging Arithmetic - 04
Prime Factors
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A prime number can only be divided by 1 or itself, so it cannot be factored any further! Every other whole number can be written as product of these prime factors.
The solution to many questions hinges upon finding the prime factors of a number. Specially, in solving problems of Data sufficiency and quantitative comparison, you are to find prime factors of a number to have a conclusion.
Prime Factorization is finding which prime numbers multiply together to make the original number.
Video Lesson - How to Find Prime Factors of a Number
Every positive non-prime number can be expressed as the product of prime numbers.
For example, take a look at how these numbers break down:
| 21 = 3, 7 |
| 105 = 3, 5, 7 |
| 1,995 = 3, 5, 7, 19 |
Video Lesson - Prime Factors
Do you remember how to figure out the prime factors of a number? We'll refresh your memory.
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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.