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Cornerstone · Grades 3–5 Keystones #1 9 August 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 9 August 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 2⁄4

    Answer: 19⁄14
  2. 2. Algebra Two-step equations

    Solve: 7x + 7 = 49

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 2:2:3

    Answer: 36, 36 and 54
  5. 5. Statistics Mean

    Calculate the mean of: 38, 42, 27, 40, 26, 5, 41. Give your answer to 2 decimal places

    Answer: 31.29

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