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Cornerstone · Grades 3–5 Keystones #1 14 May 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 14 May 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 2⁄5

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

    Solve: 5x + 3 = 28

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

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 55 in the ratio 2:1:2

    Answer: 22, 11 and 22
  5. 5. Statistics Mean

    Calculate the mean of: 21, 34, 10, 8, 30, 30, 15. Give your answer to 2 decimal places

    Answer: 21.14

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