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Cornerstone · Grades 3–5 Keystones #1 17 May 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 May 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄9 + 2⁄9

    Answer: 7⁄9
  2. 2. Algebra Two-step equations

    Solve: 4x + 3 = 39

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 162 in the ratio 3:2:4

    Answer: 54, 36 and 72
  5. 5. Statistics Mean

    Find the mean of: 11, 6, 16, 7, 8

    Answer: 9.6

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