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Cornerstone · Grades 3–5 Keystones #1 24 December 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 24 December 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 4⁄6

    Answer: 17⁄12
  2. 2. Algebra Two-step equations

    Solve: 3x + 11 = 29

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

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

    Answer: 12.73cm
  4. 4. Ratio Sharing in a ratio

    Share 90 in the ratio 2:1

    Answer: 60 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 41, 25, 27, 21, 36, 13, 42, 43

    Answer: 31

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