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Cornerstone · Grades 3–5 Keystones #1 4 December 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 4 December 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄12 + 5⁄12

    Answer: 7⁄12
  2. 2. Algebra Two-step equations

    Solve: 6x - 10 = 50

    Answer: x = 10
  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 110 in the ratio 1:2:2

    Answer: 22, 44 and 44
  5. 5. Statistics Mean

    Calculate the mean of: 11, 17, 44, 16, 34, 21. Give your answer to 2 decimal places

    Answer: 23.83

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