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Cornerstone · Grades 3–5 Keystones #1 26 August 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 26 August 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 4⁄8

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

    Solve: 7x - 5 = 100

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 11cm. Give your answer to 2 decimal places

    Answer: 13.6cm
  4. 4. Ratio Sharing in a ratio

    Share 32 in the ratio 3:1

    Answer: 24 and 8
  5. 5. Statistics Mean

    Calculate the mean of: 25, 33, 25, 35, 43, 26, 48, 37

    Answer: 34

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