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Cornerstone · Grades 3–5 Keystones #1 17 November 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 November 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄6 + 2⁄3

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 5x - 8 = 42

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 12cm. Give your answer to 2 decimal places

    Answer: 13.89cm
  4. 4. Ratio Sharing in a ratio

    Share 80 in the ratio 4:1

    Answer: 64 and 16
  5. 5. Statistics Mean

    Find the mean of: 14, 12, 3, 16, 20

    Answer: 13

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