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

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 5x + 6 = 26

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 105 in the ratio 4:2:1

    Answer: 60, 30 and 15
  5. 5. Statistics Mean

    Calculate the mean of: 14, 18, 16, 21, 26, 40, 42, 30. Give your answer to 2 decimal places

    Answer: 25.88

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