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Cornerstone · Grades 3–5 Keystones #1 6 February 2018 Skills week 1 of 7
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Five GCSE retrieval questions · 6 February 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄7 + 1⁄7

    Answer: 2⁄7
  2. 2. Algebra Two-step equations

    Solve: 6x + 9 = 27

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

    Calculate the hypotenuse when a = 5cm and b = 8cm. Give your answer to 2 decimal places

    Answer: 9.43cm
  4. 4. Ratio Sharing in a ratio

    Share 21 in the ratio 2:1

    Answer: 14 and 7
  5. 5. Statistics Mean

    Calculate the mean of: 18, 36, 19, 32, 35, 15, 30. Give your answer to 2 decimal places

    Answer: 26.43

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