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Cornerstone · Grades 3–5 Keystones #1 20 March 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 March 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 3⁄4

    Answer: 33⁄28
  2. 2. Algebra Two-step equations

    Solve: 3x - 15 = 15

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 4cm. Give your answer to 2 decimal places

    Answer: 7.21cm
  4. 4. Ratio Sharing in a ratio

    Divide 91 in the ratio 4:2:1

    Answer: 52, 26 and 13
  5. 5. Statistics Mean

    Calculate the mean of: 39, 16, 28, 32, 36, 34, 49. Give your answer to 2 decimal places

    Answer: 33.43

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