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Cornerstone · Grades 3–5 Keystones #1 14 July 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 July 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 4⁄7

    Answer: 59⁄42
  2. 2. Algebra Two-step equations

    Solve: 3x - 17 = -5

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 14.87cm
  4. 4. Ratio Sharing in a ratio

    Divide 280 in the ratio 1:2:2

    Answer: 56, 112 and 112
  5. 5. Statistics Mean

    Calculate the mean of: 6, 12, 16, 33, 24, 27, 17, 48. Give your answer to 2 decimal places

    Answer: 22.88

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