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Cornerstone · Grades 3–5 Keystones #1 20 February 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 20 February 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 2⁄5

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

    Solve: 2x + 7 = 23

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Share 98 in the ratio 4:3

    Answer: 56 and 42
  5. 5. Statistics Mean

    Calculate the mean of: 37, 28, 50, 31, 24, 22, 23, 50. Give your answer to 2 decimal places

    Answer: 33.13

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