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Cornerstone · Grades 3–5 Keystones #1 18 October 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 October 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 3⁄5

    Answer: 27⁄20
  2. 2. Algebra Two-step equations

    Solve: 4x + 11 = 55

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 5cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Share 65 in the ratio 4:1

    Answer: 52 and 13
  5. 5. Statistics Mean

    Calculate the mean of: 39, 9, 27, 20, 13, 18, 29. Give your answer to 2 decimal places

    Answer: 22.14

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