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Cornerstone · Grades 3–5 Keystones #1 17 May 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 May 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 5⁄7

    Answer: 17⁄14
  2. 2. Algebra Two-step equations

    Solve: 5x + 7 = 22

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

    Calculate the hypotenuse when a = 9cm and b = 13cm. Give your answer to 2 decimal places

    Answer: 15.81cm
  4. 4. Ratio Sharing in a ratio

    Divide 231 in the ratio 3:4:4

    Answer: 63, 84 and 84
  5. 5. Statistics Mean

    Calculate the mean of: 26, 30, 38, 10, 12, 15, 20. Give your answer to 2 decimal places

    Answer: 21.57

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