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Cornerstone · Grades 3–5 Keystones #1 11 July 2017 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 July 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 1⁄3

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x - 8 = 55

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 4cm. Give your answer to 2 decimal places

    Answer: 10.77cm
  4. 4. Ratio Sharing in a ratio

    Share 55 in the ratio 3:2

    Answer: 33 and 22
  5. 5. Statistics Mean

    Calculate the mean of: 28, 43, 20, 40, 6, 40, 45. Give your answer to 2 decimal places

    Answer: 31.71

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