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

Five GCSE retrieval questions · 5 November 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 2⁄6

    Answer: 16⁄21
  2. 2. Algebra Two-step equations

    Solve: 8x - 19 = 85

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 13cm. Give your answer to 2 decimal places

    Answer: 15.81cm
  4. 4. Ratio Sharing in a ratio

    Divide 180 in the ratio 3:1:2

    Answer: 90, 30 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 6, 21, 5, 46, 43, 9, 42. Give your answer to 2 decimal places

    Answer: 24.57

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