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Cornerstone · Grades 3–5 Keystones #1 8 October 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 8 October 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 2⁄3

    Answer: 17⁄21
  2. 2. Algebra Two-step equations

    Solve: 7x + 15 = 64

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

    Calculate the hypotenuse when a = 4cm and b = 13cm. Give your answer to 2 decimal places

    Answer: 13.6cm
  4. 4. Ratio Sharing in a ratio

    Share 30 in the ratio 3:2

    Answer: 18 and 12
  5. 5. Statistics Mean

    Find the mean of: 18, 25, 7, 2

    Answer: 13

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