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Cornerstone · Grades 3–5 Keystones #1 10 December 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 10 December 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 3x + 11 = 41

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 11.4cm
  4. 4. Ratio Sharing in a ratio

    Divide 80 in the ratio 1:1:2

    Answer: 20, 20 and 40
  5. 5. Statistics Mean

    Find the mean of: 6, 17, 16, 17

    Answer: 14

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