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Cornerstone · Grades 3–5 Keystones #1 8 January 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 January 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄12 + 3⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 6x + 3 = 33

    Answer: x = 5
  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 3:1

    Answer: 60 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 30, 43, 34, 8, 10, 40

    Answer: 27.5

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