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Cornerstone · Grades 3–5 Keystones #1 30 March 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 30 March 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄9 + 3⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 4x + 7 = 27

    Answer: x = 5
  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 70 in the ratio 3:2:2

    Answer: 30, 20 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 34, 47, 49, 34, 22, 17

    Answer: 33.8

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