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Cornerstone · Grades 3–5 Keystones #1 19 January 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 January 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 3⁄7

    Answer: 16⁄21
  2. 2. Algebra Two-step equations

    Solve: 7x + 8 = 29

    Answer: x = 3
  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

    Divide 135 in the ratio 3:1:1

    Answer: 81, 27 and 27
  5. 5. Statistics Mean

    Find the mean of: 8, 10, 5, 17

    Answer: 10

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