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Cornerstone · Grades 3–5 Keystones #1 25 February 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 February 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 4⁄5

    Answer: 31⁄20
  2. 2. Algebra Two-step equations

    Solve: 4x - 12 = 8

    Answer: x = 5
  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

    Share 39 in the ratio 2:1

    Answer: 26 and 13
  5. 5. Statistics Mean

    Calculate the mean of: 38, 50, 10, 6, 8, 47, 28

    Answer: 26.7

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