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Cornerstone · Grades 3–5 Keystones #1 2 July 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 July 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄9 + 3⁄9

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 4x - 8 = 12

    Answer: x = 5
  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 224 in the ratio 2:3:3

    Answer: 56, 84 and 84
  5. 5. Statistics Mean

    Calculate the mean of: 43, 28, 19, 39, 15, 20. Give your answer to 2 decimal places

    Answer: 27.33

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