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Cornerstone · Grades 3–5 Keystones #1 21 May 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 May 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄7 + 2⁄6

    Answer: 19⁄21
  2. 2. Algebra Two-step equations

    Solve: 5x + 15 = 70

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 4cm. Give your answer to 2 decimal places

    Answer: 7.21cm
  4. 4. Ratio Sharing in a ratio

    Share 102 in the ratio 1:2

    Answer: 34 and 68
  5. 5. Statistics Mean

    Calculate the mean of: 7, 44, 33, 25, 17, 34, 50

    Answer: 30

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