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Cornerstone · Grades 3–5 Keystones #1 25 September 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 September 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 5⁄7

    Answer: 17⁄14
  2. 2. Algebra Two-step equations

    Solve: 7x + 13 = 69

    Answer: x = 8
  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 80 in the ratio 1:3:1

    Answer: 16, 48 and 16
  5. 5. Statistics Mean

    Calculate the mean of: 49, 42, 19, 18, 12, 13, 24, 11

    Answer: 23.5

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