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Cornerstone · Grades 3–5 Keystones #1 31 December 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 31 December 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄8 + 4⁄8

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 2x - 12 = 12

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 168 in the ratio 1:3:4

    Answer: 21, 63 and 84
  5. 5. Statistics Mean

    Find the mean of: 10, 5, 10, 7

    Answer: 8

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