plumiDisproof by counter-example: WJEC A‑Level Maths questions
WJEC A-Level Maths past-paper questions on 1.2 Disproof by counter-example, 2018–2025, with mark schemes and examiner’s reports where available. Add MadAsMaths questions to your practice, or browse them separately by topic and difficulty.
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All 3 questions on Disproof by counter-example, as a list
- Summer 2023, AS Unit 1, Q8 (3 marks): Show, by counter example, that the following statement is false. 0 8 2 “For all positive integer values of n, n is a prime number.” 1 [3]
- Summer 2022, AS Unit 1, Q6 (5 marks): 6 In each of the two statements below, x and y are real numbers. One of the statements is true while the other is false. x2 + y2 x2xy , for all real values of x
- Summer 2018, AS Unit 1, Q14 (4 marks): 4 In each of the two statements below, c and d are real numbers. One of the statements is true, while the other is false. (2c – d)2 = 4c2 – d 2, for all values
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