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Cornerstone · Grades 3–5 Keystones #1 24 August 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 24 August 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 1⁄8

    Answer: 19⁄24
  2. 2. Algebra Two-step equations

    Solve: 4x - 20 = 24

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

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Divide 240 in the ratio 2:1:1

    Answer: 120, 60 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 27, 5, 45, 21, 34, 26, 37, 19

    Answer: 26.75

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