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Cornerstone · Grades 3–5 Keystones #1 9 February 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 9 February 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄8 + 2⁄8

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 4x - 20 = 0

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 12cm. Give your answer to 2 decimal places

    Answer: 12.37cm
  4. 4. Ratio Sharing in a ratio

    Divide 60 in the ratio 2:3:1

    Answer: 20, 30 and 10
  5. 5. Statistics Mean

    Find the mean of: 9, 13, 13, 11, 19

    Answer: 13

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