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Cornerstone · Grades 3–5 Keystones #1 31 March 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 31 March 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄8 + 2⁄3

    Answer: 19⁄24
  2. 2. Algebra Two-step equations

    Solve: 6x - 11 = 79

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 11cm

    Answer: 14.21cm
  4. 4. Ratio Sharing in a ratio

    Divide 145 in the ratio 1:3:1

    Answer: 29, 87 and 29
  5. 5. Statistics Mean

    Find the mean of: 2, 7, 5, 6

    Answer: 5

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