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Cornerstone · Grades 3–5 Keystones #1 30 October 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 30 October 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 4⁄8

    Answer: 19⁄14
  2. 2. Algebra Two-step equations

    Solve: 2x + 12 = 22

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

    Calculate the hypotenuse when a = 12cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 13.89cm
  4. 4. Ratio Sharing in a ratio

    Share 75 in the ratio 4:1

    Answer: 60 and 15
  5. 5. Statistics Mean

    Find the mean of: 3, 16, 5, 3, 13

    Answer: 8

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