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Cornerstone · Grades 3–5 Keystones #1 18 April 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 April 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 6⁄7

    Answer: 32⁄21
  2. 2. Algebra Two-step equations

    Solve: 2x - 17 = 9

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 192 in the ratio 2:1:1

    Answer: 96, 48 and 48
  5. 5. Statistics Mean

    Find the mean of: 20, 12, 6, 2

    Answer: 10

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