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Cornerstone · Grades 3–5 Keystones #1 7 January 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 7 January 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄8 + 2⁄7

    Answer: 29⁄28
  2. 2. Algebra Two-step equations

    Solve: 2x + 12 = 36

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 9cm. Give your answer to 2 decimal places

    Answer: 12.04cm
  4. 4. Ratio Sharing in a ratio

    Share 60 in the ratio 1:2

    Answer: 20 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 20, 28, 13, 30, 43, 35, 19, 36

    Answer: 28

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