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Cornerstone · Grades 3–5 Keystones #1 13 July 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 13 July 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄9 + 4⁄9

    Answer: 7⁄9
  2. 2. Algebra Two-step equations

    Solve: 2x + 8 = 24

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 112 in the ratio 1:1:2

    Answer: 28, 28 and 56
  5. 5. Statistics Mean

    Calculate the mean of: 27, 40, 13, 24, 22, 6

    Answer: 22

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