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Cornerstone · Grades 3–5 Keystones #1 20 October 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 20 October 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄6 + 2⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 5x + 14 = 49

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 108 in the ratio 1:2

    Answer: 36 and 72
  5. 5. Statistics Mean

    Calculate the mean of: 33, 44, 37, 36, 22, 43, 38. Give your answer to 2 decimal places

    Answer: 36.14

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