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Cornerstone · Grades 3–5 Keystones #1 11 August 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 August 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 3⁄6

    Answer: 9⁄14
  2. 2. Algebra Two-step equations

    Solve: 6x + 3 = 21

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

    Calculate the hypotenuse when a = 7cm and b = 8cm. Give your answer to 2 decimal places

    Answer: 10.63cm
  4. 4. Ratio Sharing in a ratio

    Share 15 in the ratio 1:2

    Answer: 5 and 10
  5. 5. Statistics Mean

    Calculate the mean of: 25, 10, 40, 33, 22, 35, 37. Give your answer to 2 decimal places

    Answer: 28.86

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