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Cornerstone · Grades 3–5 Keystones #1 29 January 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 29 January 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 3⁄4

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x + 8 = 36

    Answer: x = 4
  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 25 in the ratio 4:1

    Answer: 20 and 5
  5. 5. Statistics Mean

    Calculate the mean of: 38, 42, 16, 49, 30, 27, 31. Give your answer to 2 decimal places

    Answer: 33.29

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