Prime Numbers and Prime Factorization

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🎬 Video Tutorial

  • (0:01) Definition of Prime Numbers: Prime numbers have exactly two factors (1 and the number itself). 1 is not a prime number, and 2 is the smallest prime number.
  • (0:46) Common Prime Numbers under 20: 2, 3, 5, 7, 11, 13, 17, 19
  • (0:58) Prime Factorization: Expresses any number as a product of prime factors. For example, 90 can be factorised $2 \times 3^2 \times 5$.
  • (2:19) Methods of Prime Factorization: Use the division method or create a factor tree method to break down numbers visually into their prime factors.

📂 Revision Cards

Explanation and example of prime numbers, stating that 2 is the smallest prime number.
1) Prime Numbers
Cartoon dolphin showing prime numbers under 20, which are 2, 3, 5, 7, 11, 13, 17, and 19.
2) Prime Numbers below 20
Prime factorization of 90 using the division method step by step.
3) Prime Factorization Division Method
Prime factorization of 126 using the factor tree method step by step.
4) Prime Factorization: Factor Tree Method

🍪 Quiz Time - Practice Now!

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