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Cornerstone · Grades 3–5 Keystones #1 4 August 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 August 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 4⁄6

    Answer: 16⁄15
  2. 2. Algebra Two-step equations

    Solve: 7x + 5 = 89

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

    Calculate the hypotenuse when a = 4cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 15.52cm
  4. 4. Ratio Sharing in a ratio

    Share 85 in the ratio 4:1

    Answer: 68 and 17
  5. 5. Statistics Mean

    Calculate the mean of: 31, 28, 29, 40, 28, 10, 42. Give your answer to 2 decimal places

    Answer: 29.71

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