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Cornerstone · Grades 3–5 Keystones #1 27 April 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 27 April 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄12 + 3⁄12

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 4x + 3 = 31

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Share 30 in the ratio 1:4

    Answer: 6 and 24
  5. 5. Statistics Mean

    Calculate the mean of: 21, 48, 20, 23, 16, 22, 26, 33. Give your answer to 2 decimal places

    Answer: 26.13

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