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Lintel · Grades 5–7 Keystones #71 12 March 2026 Skills week 4 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 12 March 2026 · mathsvault.uk/keystones

  1. 1. Number Product of primes

    Express 120 as a product of prime factors

    Answer: 2³ × 3 × 5
  2. 2. Algebra Linear simultaneous equations

    Solve: 4x + 3y = 41 and x + y = 11

    Answer: x = 8, y = 3
  3. 3. Geometry Pythagoras — short side

    Find b if a = 9cm and c = 15cm

    Answer: 12cm
  4. 4. Ratio Combining two ratios

    a:b is 2:1 and b:c is 3:4. Find a:b:c.

    Answer: 12:6:8
  5. 5. Statistics Expected frequency

    A fair coin is flipped 154 times. How many heads would you expect?

    Answer: 77