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Cornerstone · Grades 3–5 Keystones #1 8 May 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 May 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄12 + 3⁄12

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 7x - 6 = 22

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 9cm. Give your answer to 2 decimal places

    Answer: 9.49cm
  4. 4. Ratio Sharing in a ratio

    Share 30 in the ratio 1:2

    Answer: 10 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 45, 5, 48, 9, 31, 49, 15. Give your answer to 2 decimal places

    Answer: 28.86

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