Mathematics · Oct / Nov 2025 · Paper 42 · Question 14

27 223 [2]

4 3.2

M1 for 24 000 × + 1 100

10 370 [3]

B2 for 30 500

or M2 for 40 870 × 34 oe 134 34 +

or M1 for 1 x = 40 870 oe 100

V = 32 500 × 0.77n final answer [3]

B2 for answer 32 500 × 0.77n or for correct explicit formula seen in working, may be unsimplified

or M1 for 32 500 × (1 – 0.23)n oe seen or for correct implicit formula seen, may be unsimplified or answer of form V = 32 500 × kn or answer of form V = p × (0.77 oe)n