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Cornerstone · Grades 3–5 Keystones #1 3 September 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 3 September 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄8 + 5⁄7

    Answer: 17⁄14
  2. 2. Algebra Two-step equations

    Solve: 7x - 18 = 24

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 16.16cm
  4. 4. Ratio Sharing in a ratio

    Share 40 in the ratio 2:3

    Answer: 16 and 24
  5. 5. Statistics Mean

    Find the mean of: 7, 9, 4, 17, 3

    Answer: 8

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