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Cornerstone · Grades 3–5 Keystones #1 23 September 2016 Skills week 1 of 7
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Five GCSE retrieval questions · 23 September 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄5 + 2⁄7

    Answer: 38⁄35
  2. 2. Algebra Two-step equations

    Solve: 2x + 5 = 21

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 5cm. Give your answer to 2 decimal places

    Answer: 11.18cm
  4. 4. Ratio Sharing in a ratio

    Share 57 in the ratio 2:1

    Answer: 38 and 19
  5. 5. Statistics Mean

    Calculate the mean of: 6, 40, 26, 40, 13, 9, 8. Give your answer to 2 decimal places

    Answer: 20.29

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