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Cornerstone · Grades 3–5 Keystones #1 29 March 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 29 March 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄7 + 5⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 2x + 12 = 28

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Divide 65 in the ratio 1:1:3

    Answer: 13, 13 and 39
  5. 5. Statistics Mean

    Find the mean of: 4, 24, 17

    Answer: 15

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