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Cornerstone · Grades 3–5 Keystones #1 4 September 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 September 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄10 + 2⁄10

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

    Solve: 5x - 7 = 48

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

    Calculate the hypotenuse when a = 6cm and b = 5cm. Give your answer to 2 decimal places

    Answer: 7.81cm
  4. 4. Ratio Sharing in a ratio

    Divide 60 in the ratio 1:1:2

    Answer: 15, 15 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 41, 27, 37, 5, 18, 22

    Answer: 25

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