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Cornerstone · Grades 3–5 Keystones #1 22 September 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 September 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄7 + 7⁄8

    Answer: 81⁄56
  2. 2. Algebra Two-step equations

    Solve: 7x + 10 = 80

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

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Share 60 in the ratio 1:2

    Answer: 20 and 40
  5. 5. Statistics Mean

    Find the mean of: 16, 14, 11, 5, 14

    Answer: 12

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