Calculating integers from their prime factor expressions | Maths

Starter quiz

Fill in the missing word: Integers greater than 1 are either composite or ______.
- 'prime' ✓
Which of the following shows that 77 is a composite number?
- 77 × 1
- 7 × 11 ✓
- 1 × 77
- 11 × 7 ✓
What is the missing number in the first step in the process to find prime factors of 75? $75 = 3 \times$ ______
- '25' ✓
What is the missing product in this process to find prime factors of 75?
- 15 + 10
- 20 + 5
- 1 × 25
- 5 × 5 ✓
Given 120 = $2^3\times3\times5$ , which of the following equals 360?
- $2^4\times3\times5$
- $2^3\times3\times5^2$
- $2^3\times3^2\times5$ ✓
Given 120 = $2^3\times3\times5$ , which of the following equals 60?
- $2^3\times3\times5$
- $2^2\times3^2\times5$
- $2^2\times3\times5$ ✓