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Cornerstone · Grades 3–5 Keystones #1 7 January 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 7 January 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 4⁄6

    Answer: 17⁄21
  2. 2. Algebra Two-step equations

    Solve: 3x + 3 = 30

    Answer: x = 9
  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 72 in the ratio 2:1:3

    Answer: 24, 12 and 36
  5. 5. Statistics Mean

    Find the mean of: 20, 2, 10, 12

    Answer: 11

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