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Cornerstone · Grades 3–5 Keystones #1 21 November 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 November 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 1⁄8

    Answer: 23⁄24
  2. 2. Algebra Two-step equations

    Solve: 7x + 11 = 95

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 60 in the ratio 2:1:3

    Answer: 20, 10 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 29, 43, 14, 16, 44, 21, 44

    Answer: 30.1

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