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Cornerstone · Grades 3–5 Keystones #1 11 June 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 11 June 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 2⁄5

    Answer: 11⁄15
  2. 2. Algebra Two-step equations

    Solve: 8x - 16 = 40

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 18.03cm
  4. 4. Ratio Sharing in a ratio

    Divide 80 in the ratio 1:1:2

    Answer: 20, 20 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 38, 49, 5, 12, 16, 33, 32, 35

    Answer: 27.5

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