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Cornerstone · Grades 3–5 Keystones #1 13 April 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 13 April 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 6⁄7

    Answer: 19⁄14
  2. 2. Algebra Two-step equations

    Solve: 6x - 12 = 42

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 198 in the ratio 4:2:3

    Answer: 88, 44 and 66
  5. 5. Statistics Mean

    Find the mean of: 12, 25, 7, 15, 16

    Answer: 15

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