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Cornerstone · Grades 3–5 Keystones #1 28 May 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 28 May 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 2⁄4

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 4x - 11 = 21

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 243 in the ratio 1:4:4

    Answer: 27, 108 and 108
  5. 5. Statistics Mean

    Calculate the mean of: 15, 9, 12, 38, 22, 26. Give your answer to 2 decimal places

    Answer: 20.33

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