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

  1. 1. Number Adding fractions

    Calculate: 3⁄10 + 5⁄10

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

    Solve: 7x + 11 = 53

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

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 100 in the ratio 1:4

    Answer: 20 and 80
  5. 5. Statistics Mean

    Calculate the mean of: 25, 8, 17, 8, 33, 35, 29. Give your answer to 2 decimal places

    Answer: 22.14

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