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Cornerstone · Grades 3–5 Keystones #1 25 April 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 April 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 1⁄8

    Answer: 11⁄24
  2. 2. Algebra Two-step equations

    Solve: 4x - 20 = 4

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 4cm. Give your answer to 2 decimal places

    Answer: 10.77cm
  4. 4. Ratio Sharing in a ratio

    Divide 184 in the ratio 3:2:3

    Answer: 69, 46 and 69
  5. 5. Statistics Mean

    Calculate the mean of: 21, 47, 7, 34, 5, 21

    Answer: 22.5

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