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Cornerstone · Grades 3–5 Keystones #1 30 October 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 30 October 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄7 + 1⁄7

    Answer: 4⁄7
  2. 2. Algebra Two-step equations

    Solve: 3x - 9 = 12

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

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 84 in the ratio 4:1:2

    Answer: 48, 12 and 24
  5. 5. Statistics Mean

    Calculate the mean of: 11, 21, 25, 42, 13, 43, 37, 25. Give your answer to 2 decimal places

    Answer: 27.13

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