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Cornerstone · Grades 3–5 Keystones #1 8 March 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 March 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄8 + 2⁄8

    Answer: 5⁄8
  2. 2. Algebra Two-step equations

    Solve: 3x - 18 = 24

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 140 in the ratio 4:1:2

    Answer: 80, 20 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 27, 42, 37, 25, 41, 30, 40, 26

    Answer: 33.5

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