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Cornerstone · Grades 3–5 Keystones #1 1 February 2015 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 1 February 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄7 + 2⁄3

    Answer: 20⁄21
  2. 2. Algebra Two-step equations

    Solve: 4x + 14 = 50

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

    Calculate the hypotenuse when a = 7cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 16.55cm
  4. 4. Ratio Sharing in a ratio

    Share 70 in the ratio 1:4

    Answer: 14 and 56
  5. 5. Statistics Mean

    Calculate the mean of: 11, 9, 43, 33, 16, 28, 21, 29

    Answer: 23.75

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