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Cornerstone · Grades 3–5 Keystones #1 10 September 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 September 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄7 + 5⁄8

    Answer: 51⁄56
  2. 2. Algebra Two-step equations

    Solve: 5x + 6 = 56

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 112 in the ratio 2:1:1

    Answer: 56, 28 and 28
  5. 5. Statistics Mean

    Find the mean of: 16, 4, 14, 17, 9

    Answer: 12

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