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Cornerstone · Grades 3–5 Keystones #1 22 March 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 22 March 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄6 + 1⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 7x + 3 = 73

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

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 135 in the ratio 1:1:3

    Answer: 27, 27 and 81
  5. 5. Statistics Mean

    Find the mean of: 3, 23, 17, 9, 3

    Answer: 11

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