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Cornerstone · Grades 3–5 Keystones #1 9 September 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 9 September 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄11 + 3⁄11

    Answer: 5⁄11
  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 15cm and 20cm

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

    Share 30 in the ratio 3:2

    Answer: 18 and 12
  5. 5. Statistics Mean

    Calculate the mean of: 44, 44, 45, 40, 39, 21, 37, 25. Give your answer to 2 decimal places

    Answer: 36.88

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