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Cornerstone · Grades 3–5 Keystones #1 31 August 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 31 August 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 6x + 15 = 33

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

    Calculate the hypotenuse when a = 8cm and b = 12cm. Give your answer to 2 decimal places

    Answer: 14.42cm
  4. 4. Ratio Sharing in a ratio

    Share 60 in the ratio 2:1

    Answer: 40 and 20
  5. 5. Statistics Mean

    Find the mean of: 11, 2, 7, 4, 16

    Answer: 8

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