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Prime Numbers and Prime Factorization

Numbers and Decimals Prime Numbers and Prime Factorization

🎬 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 Factorisation: Expresses any number as a product of prime numbers. For example, 90 can be factorised $2 \times 3^2 \times 5$.
(2:19) Methods of Prime Factorisation: Use the division method or create a factor tree 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 factorisation of 90 using the division method step by step. — 3) Prime Factorisation Division Method

Prime factorisation of 126 using the factor tree method step by step. — 4) Prime Factorisation: Factor Tree Method

🍪 Quiz

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