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Grade 5 - Mathematics
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.
Q 1: What are the factors of the number: 338?
1x2x13x13
1x2x2x13x13
1x2x3x13x13
1x2x2x2x13x13

Q 2: What are the factors of the number: 237?
1x3x79
1x2x3x79
1x2x2x3x79
1x3x3x79

Q 3: What are the factors of the number: 208?
1x2x2x2x2x3x13
1x2x2x2x2x13
1x2x2x2x2x2x13
1x2x2x2x2x2x2x13

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