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Cornerstone · Grades 3–5 Keystones #1 13 December 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 13 December 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄6 + 3⁄8

    Answer: 25⁄24
  2. 2. Algebra Two-step equations

    Solve: 3x - 7 = 20

    Answer: x = 9
  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 216 in the ratio 4:3:1

    Answer: 108, 81 and 27
  5. 5. Statistics Mean

    Find the mean of: 9, 3, 16, 17, 25

    Answer: 14

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