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Cornerstone · Grades 3–5 Keystones #1 14 June 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 14 June 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 2⁄3

    Answer: 16⁄15
  2. 2. Algebra Two-step equations

    Solve: 4x + 15 = 63

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 80 in the ratio 1:2:2

    Answer: 16, 32 and 32
  5. 5. Statistics Mean

    Find the mean of: 4, 17, 12, 15, 17

    Answer: 13

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