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Cornerstone · Grades 3–5 Keystones #1 21 November 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 21 November 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄12 + 8⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x - 19 = 9

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 16.16cm
  4. 4. Ratio Sharing in a ratio

    Divide 168 in the ratio 1:4:1

    Answer: 28, 112 and 28
  5. 5. Statistics Mean

    Find the mean of: 4, 4, 17, 23

    Answer: 12

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