Formulae and Equations
25 free practice questions with explanations
PassNova has 25 free Functional Skills Maths L2 practice questions on Formulae and Equations, each with a clear explanation. Practise them in the browser with instant feedback — 100% free, no sign-up, on any device. Updated for 2026.
Formulae and Equations: example questions & answers
12 worked examples with answers and explanations below. Practise all 25 Formulae and Equations questions free in the browser, with instant feedback on every answer.
If y = 2x + 3, what is y when x = 5?
- A8
- B10
- C13✓
- D15
Answer: y = (2 × 5) + 3 = 10 + 3 = 13.
Solve: x + 5 = 12
- A5
- B7✓
- C12
- D17
Answer: x = 12 - 5 = 7.
Solve: 3x = 24
- A6
- B7
- C8✓
- D9
Answer: x = 24 ÷ 3 = 8.
If y = x² + 2, what is y when x = 3?
- A8
- B9
- C11✓
- D13
Answer: y = 3² + 2 = 9 + 2 = 11.
Solve: 2x + 4 = 10
- A2
- B3✓
- C4
- D5
Answer: 2x + 4 = 10. 2x = 6. x = 3.
If y = 5x - 2, what is y when x = 2?
- A4
- B8✓
- C10
- D12
Answer: y = (5 × 2) - 2 = 10 - 2 = 8.
Solve: x - 8 = 3
- A5
- B8
- C11✓
- D24
Answer: x = 3 + 8 = 11.
If C = 2πr and π ≈ 3.14, what is C when r = 5?
- A10
- B15.7
- C31.4✓
- D78.5
Answer: C = 2 × 3.14 × 5 = 31.4.
Solve: x/4 = 5
- A5
- B10
- C20✓
- D40
Answer: x = 5 × 4 = 20.
If y = 3x, what is y when x = 4?
- A7
- B12✓
- C16
- D20
Answer: y = 3 × 4 = 12.
Rearrange to make x the subject: y = x + 5
- Ax = y + 5
- Bx = y - 5✓
- Cx = 5y
- Dx = y/5
Answer: y = x + 5. x = y - 5.
Solve: 5x - 3 = 17
- A2.8
- B4✓
- C5
- D6
Answer: 5x = 17 + 3 = 20. x = 20 ÷ 5 = 4.