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Cornerstone · Grades 3–5 Keystones #1 1 November 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 1 November 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄6 + 6⁄8

    Answer: 17⁄12
  2. 2. Algebra Two-step equations

    Solve: 3x + 15 = 51

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 15.65cm
  4. 4. Ratio Sharing in a ratio

    Divide 192 in the ratio 3:1:4

    Answer: 72, 24 and 96
  5. 5. Statistics Mean

    Calculate the mean of: 32, 34, 24, 18, 29, 10, 22, 33

    Answer: 25.25

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