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Cornerstone · Grades 3–5 Keystones #1 25 September 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 September 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 5⁄7

    Answer: 29⁄21
  2. 2. Algebra Two-step equations

    Solve: 2x + 11 = 27

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

    Calculate the hypotenuse when a = 3cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 15.3cm
  4. 4. Ratio Sharing in a ratio

    Share 39 in the ratio 1:2

    Answer: 13 and 26
  5. 5. Statistics Mean

    Find the mean of: 13, 13, 13

    Answer: 13

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