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Cornerstone · Grades 3–5 Keystones #1 18 May 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 May 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄8 + 4⁄8

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

    Solve: 7x + 15 = 57

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

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

    Divide 88 in the ratio 1:1:2

    Answer: 22, 22 and 44
  5. 5. Statistics Mean

    Find the mean of: 5, 2, 10, 3, 13

    Answer: 6.6

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