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Cornerstone · Grades 3–5 Keystones #1 12 February 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 12 February 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 5⁄7

    Answer: 22⁄21
  2. 2. Algebra Two-step equations

    Solve: 6x - 11 = 13

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 5cm. Give your answer to 2 decimal places

    Answer: 8.6cm
  4. 4. Ratio Sharing in a ratio

    Share 39 in the ratio 2:1

    Answer: 26 and 13
  5. 5. Statistics Mean

    Find the mean of: 5, 15, 6, 12, 7

    Answer: 9

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