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

  1. 1. Number Adding fractions

    Calculate: 6⁄12 + 4⁄12

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

    Solve: 5x - 18 = 57

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 54 in the ratio 2:1

    Answer: 36 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 49, 49, 25, 29, 21, 33, 10. Give your answer to 2 decimal places

    Answer: 30.86

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