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Cornerstone · Grades 3–5 Keystones #1 20 December 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 20 December 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄7 + 3⁄4

    Answer: 37⁄28
  2. 2. Algebra Two-step equations

    Solve: 4x + 5 = 25

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 189 in the ratio 2:1:4

    Answer: 54, 27 and 108
  5. 5. Statistics Mean

    Find the mean of: 9, 21, 12

    Answer: 14

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