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Cornerstone · Grades 3–5 Keystones #1 13 April 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 13 April 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄9 + 2⁄9

    Answer: 5⁄9
  2. 2. Algebra Two-step equations

    Solve: 4x - 15 = 25

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 133 in the ratio 2:1:4

    Answer: 38, 19 and 76
  5. 5. Statistics Mean

    Find the mean of: 16, 10, 12, 18

    Answer: 14

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