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Cornerstone · Grades 3–5 Keystones #1 27 March 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 27 March 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄8 + 4⁄7

    Answer: 53⁄56
  2. 2. Algebra Two-step equations

    Solve: 6x - 19 = 17

    Answer: x = 6
  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 104 in the ratio 2:1:1

    Answer: 52, 26 and 26
  5. 5. Statistics Mean

    Calculate the mean of: 38, 16, 18, 8, 7, 20, 11. Give your answer to 2 decimal places

    Answer: 16.86

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