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Cornerstone · Grades 3–5 Keystones #1 5 July 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 5 July 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 4⁄5

    Answer: 21⁄20
  2. 2. Algebra Two-step equations

    Solve: 4x - 20 = 8

    Answer: x = 7
  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 182 in the ratio 2:4:1

    Answer: 52, 104 and 26
  5. 5. Statistics Mean

    Calculate the mean of: 12, 45, 17, 32, 21, 27, 30. Give your answer to 2 decimal places

    Answer: 26.29

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