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Cornerstone · Grades 3–5 Keystones #1 20 July 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 July 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄6 + 3⁄7

    Answer: 25⁄42
  2. 2. Algebra Two-step equations

    Solve: 3x + 9 = 39

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 4cm. Give your answer to 2 decimal places

    Answer: 6.4cm
  4. 4. Ratio Sharing in a ratio

    Share 68 in the ratio 1:3

    Answer: 17 and 51
  5. 5. Statistics Mean

    Find the mean of: 12, 5, 13

    Answer: 10

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