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Cornerstone · Grades 3–5 Keystones #1 23 December 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 23 December 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄8 + 2⁄8

    Answer: 3⁄8
  2. 2. Algebra Two-step equations

    Solve: 2x + 12 = 22

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Share 90 in the ratio 1:2

    Answer: 30 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 38, 50, 5, 15, 15, 5, 48, 17. Give your answer to 2 decimal places

    Answer: 24.13

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