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

Five GCSE retrieval questions · 1 August 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 2⁄3

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 5x - 15 = 45

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 4cm. Give your answer to 2 decimal places

    Answer: 9.85cm
  4. 4. Ratio Sharing in a ratio

    Divide 250 in the ratio 2:2:1

    Answer: 100, 100 and 50
  5. 5. Statistics Mean

    Calculate the mean of: 33, 32, 32, 37, 14, 35, 40. Give your answer to 2 decimal places

    Answer: 31.86

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