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Cornerstone · Grades 3–5 Keystones #1 11 August 2014 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 August 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 1⁄6

    Answer: 43⁄42
  2. 2. Algebra Two-step equations

    Solve: 5x - 20 = 55

    Answer: x = 15
  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 96 in the ratio 3:1:2

    Answer: 48, 16 and 32
  5. 5. Statistics Mean

    Find the mean of: 18, 5, 20, 4, 13

    Answer: 12

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