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Cornerstone · Grades 3–5 Keystones #1 11 April 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 April 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 1⁄3

    Answer: 11⁄15
  2. 2. Algebra Two-step equations

    Solve: 4x + 9 = 25

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 70 in the ratio 2:4:1

    Answer: 20, 40 and 10
  5. 5. Statistics Mean

    Find the mean of: 6, 6, 5

    Answer: 5.6666666666667

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