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Cornerstone · Grades 3–5 Keystones #1 16 October 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 16 October 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 2⁄5

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

    Solve: 4x - 8 = 52

    Answer: x = 15
  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 96 in the ratio 1:3:2

    Answer: 16, 48 and 32
  5. 5. Statistics Mean

    Calculate the mean of: 28, 49, 42, 41, 21, 5

    Answer: 31

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