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Cornerstone · Grades 3–5 Keystones #1 14 November 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 14 November 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 3⁄8

    Answer: 25⁄24
  2. 2. Algebra Two-step equations

    Solve: 5x + 11 = 71

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 4cm. Give your answer to 2 decimal places

    Answer: 10.77cm
  4. 4. Ratio Sharing in a ratio

    Share 114 in the ratio 2:1

    Answer: 76 and 38
  5. 5. Statistics Mean

    Find the mean of: 9, 11, 2, 2, 21

    Answer: 9

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