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Cornerstone · Grades 3–5 Keystones #1 18 November 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 18 November 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 2⁄7

    Answer: 13⁄21
  2. 2. Algebra Two-step equations

    Solve: 2x + 8 = 26

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

    Calculate the hypotenuse when a = 4cm and b = 12cm. Give your answer to 2 decimal places

    Answer: 12.65cm
  4. 4. Ratio Sharing in a ratio

    Divide 171 in the ratio 3:4:2

    Answer: 57, 76 and 38
  5. 5. Statistics Mean

    Calculate the mean of: 27, 10, 42, 40, 31, 39, 42, 45

    Answer: 34.5

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