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Cornerstone · Grades 3–5 Keystones #1 8 February 2018 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 February 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 1⁄3

    Answer: 10⁄21
  2. 2. Algebra Two-step equations

    Solve: 4x - 15 = 21

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

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Share 108 in the ratio 1:2

    Answer: 36 and 72
  5. 5. Statistics Mean

    Find the mean of: 2, 18, 2, 18

    Answer: 10

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