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Cornerstone · Grades 3–5 Keystones #1 1 September 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 1 September 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄12 + 3⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 5x + 4 = 49

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 17.49cm
  4. 4. Ratio Sharing in a ratio

    Share 80 in the ratio 1:3

    Answer: 20 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 50, 47, 28, 18, 41, 25, 39, 10

    Answer: 32.25

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