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Cornerstone · Grades 3–5 Keystones #1 13 December 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 13 December 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄6 + 1⁄6

    Answer: 1⁄3
  2. 2. Algebra Two-step equations

    Solve: 3x - 6 = 18

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 8cm

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

    Share 45 in the ratio 3:2

    Answer: 27 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 10, 34, 39, 12, 46, 21, 18. Give your answer to 2 decimal places

    Answer: 25.71

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