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Cornerstone · Grades 3–5 Keystones #1 4 September 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 September 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 1⁄3

    Answer: 7⁄12
  2. 2. Algebra Two-step equations

    Solve: 3x - 17 = 10

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 15.81cm
  4. 4. Ratio Sharing in a ratio

    Share 30 in the ratio 2:1

    Answer: 20 and 10
  5. 5. Statistics Mean

    Find the mean of: 11, 12, 10, 17, 20

    Answer: 14

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