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Cornerstone · Grades 3–5 Keystones #1 12 September 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 12 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 - 8 = 22

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

    Calculate the hypotenuse when a = 11cm and b = 6cm. Give your answer to 2 decimal places

    Answer: 12.53cm
  4. 4. Ratio Sharing in a ratio

    Share 85 in the ratio 1:4

    Answer: 17 and 68
  5. 5. Statistics Mean

    Find the mean of: 9, 2, 7, 22

    Answer: 10

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