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Cornerstone · Grades 3–5 Keystones #1 31 March 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 31 March 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄7 + 1⁄3

    Answer: 22⁄21
  2. 2. Algebra Two-step equations

    Solve: 7x - 13 = 85

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 11cm. Give your answer to 2 decimal places

    Answer: 16.28cm
  4. 4. Ratio Sharing in a ratio

    Share 100 in the ratio 1:4

    Answer: 20 and 80
  5. 5. Statistics Mean

    Find the mean of: 9, 18, 13, 16, 19

    Answer: 15

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