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Cornerstone · Grades 3–5 Keystones #1 27 March 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 27 March 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄12 + 2⁄12

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 5x - 19 = 6

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 12cm. Give your answer to 2 decimal places

    Answer: 12.65cm
  4. 4. Ratio Sharing in a ratio

    Divide 105 in the ratio 2:1:2

    Answer: 42, 21 and 42
  5. 5. Statistics Mean

    Calculate the mean of: 23, 44, 32, 22, 17, 31, 31, 31. Give your answer to 2 decimal places

    Answer: 28.88

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