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Cornerstone · Grades 3–5 Keystones #1 11 April 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 11 April 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄10 + 3⁄10

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 3x + 3 = 18

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

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 234 in the ratio 3:4:2

    Answer: 78, 104 and 52
  5. 5. Statistics Mean

    Calculate the mean of: 13, 24, 28, 22, 48, 18

    Answer: 25.5

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