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Cornerstone · Grades 3–5 Keystones #1 16 July 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 July 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 1⁄8

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 6x + 15 = 69

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

    Calculate the hypotenuse when a = 12cm and b = 11cm. Give your answer to 2 decimal places

    Answer: 16.28cm
  4. 4. Ratio Sharing in a ratio

    Divide 65 in the ratio 1:3:1

    Answer: 13, 39 and 13
  5. 5. Statistics Mean

    Find the mean of: 11, 10, 10, 1

    Answer: 8

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