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Cornerstone · Grades 3–5 Keystones #1 8 March 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 March 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄8 + 3⁄4

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 2x + 7 = 27

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 10cm

    Answer: 11.18cm
  4. 4. Ratio Sharing in a ratio

    Share 42 in the ratio 4:3

    Answer: 24 and 18
  5. 5. Statistics Mean

    Find the mean of: 4, 8, 20

    Answer: 10.666666666667

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