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Cornerstone · Grades 3–5 Keystones #1 13 March 2016 Skills week 1 of 7
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Five GCSE retrieval questions · 13 March 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 6⁄7

    Answer: 32⁄21
  2. 2. Algebra Two-step equations

    Solve: 6x - 5 = 79

    Answer: x = 14
  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 200 in the ratio 2:2:1

    Answer: 80, 80 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 27, 14, 5, 27, 8, 5, 22, 49. Give your answer to 2 decimal places

    Answer: 19.63

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