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

Five GCSE retrieval questions · 3 May 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄8 + 4⁄8

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 7x - 12 = 23

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 10cm

    Answer: 10.44cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 4:2:1

    Answer: 72, 36 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 16, 32, 13, 31, 21, 23

    Answer: 22.7

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