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Cornerstone · Grades 3–5 Keystones #1 11 August 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 August 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 1⁄5

    Answer: 2⁄5
  2. 2. Algebra Two-step equations

    Solve: 5x + 10 = 45

    Answer: x = 7
  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 21 in the ratio 2:1

    Answer: 14 and 7
  5. 5. Statistics Mean

    Calculate the mean of: 25, 28, 44, 36, 22, 27, 11, 23

    Answer: 27

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