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

Five GCSE retrieval questions · 5 January 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄9 + 2⁄9

    Answer: 5⁄9
  2. 2. Algebra Two-step equations

    Solve: 8x - 17 = 95

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 4cm. Give your answer to 2 decimal places

    Answer: 12.65cm
  4. 4. Ratio Sharing in a ratio

    Share 100 in the ratio 2:3

    Answer: 40 and 60
  5. 5. Statistics Mean

    Find the mean of: 3, 20, 20, 10, 12

    Answer: 13

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