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Cornerstone · Grades 3–5 Keystones #1 29 November 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 29 November 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 2x - 11 = 1

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 182 in the ratio 2:4:1

    Answer: 52, 104 and 26
  5. 5. Statistics Mean

    Find the mean of: 3, 17, 19

    Answer: 13

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