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Date:___________________

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Grade 5 - Mathematics
1.17 Prime Factorization of Numbers up to 500

Method:
  1. Factorize the given number.
  2. The factors chosen need to be a prime number.
Example: Find the prime factors of 144.
  1. Factorise 144.
  2. 144 = 12 x 12
  3. 12 can be written as 4 x 3.
  4. 4 can be written as 2x2.
  5. Hence 144 is 2x2x3x2x2x3.
Answer: 2x2x3x2x2x3


Directions: Find the prime factors of the following. Also write at least ten examples of your own.

Name: ___________________

Date:___________________

Grade 5 - Mathematics
1.17 Prime Factorization of Numbers up to 500

Q 1: What are the factors of the number: 315?
1x3x3x3x5x7
1x2x3x3x5x7
1x3x3x5x7
1x2x2x3x3x5x7

Q 2: What are the factors of the number: 172?
1x2x2x3x43
1x2x2x2x43
1x2x2x43
1x2x2x2x2x43

Q 3: What are the factors of the number: 159?
1x2x3x53
1x3x3x53
1x3x53
1x2x2x3x53

Q 4: What are the factors of the number: 473?
1x11x43
1x3x11x43
1x2x2x11x43
1x2x11x43

Q 5: What are the factors of the number: 411?
1x2x2x3x137
1x3x3x137
1x2x3x137
1x3x137

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