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Cornerstone · Grades 3–5 Keystones #1 16 October 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 October 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 1⁄8

    Answer: 15⁄56
  2. 2. Algebra Two-step equations

    Solve: 3x + 7 = 40

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Share 60 in the ratio 1:2

    Answer: 20 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 41, 39, 19, 21, 9, 25, 47, 25

    Answer: 28.3

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