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Cornerstone · Grades 3–5 Keystones #1 29 May 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 29 May 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 3⁄7

    Answer: 23⁄21
  2. 2. Algebra Two-step equations

    Solve: 3x + 4 = 31

    Answer: x = 9
  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 76 in the ratio 3:1

    Answer: 57 and 19
  5. 5. Statistics Mean

    Calculate the mean of: 34, 40, 32, 37, 44, 15, 29, 40. Give your answer to 2 decimal places

    Answer: 33.88

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