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Cornerstone · Grades 3–5 Keystones #1 16 December 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 16 December 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄7 + 1⁄7

    Answer: 4⁄7
  2. 2. Algebra Two-step equations

    Solve: 7x + 14 = 63

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

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Share 75 in the ratio 2:3

    Answer: 30 and 45
  5. 5. Statistics Mean

    Find the mean of: 3, 14, 16, 13, 9

    Answer: 11

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