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Cornerstone · Grades 3–5 Keystones #1 27 April 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 27 April 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄6 + 4⁄6

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

    Solve: 8x - 11 = 53

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 72 in the ratio 1:3

    Answer: 18 and 54
  5. 5. Statistics Mean

    Calculate the mean of: 31, 37, 35, 27, 43, 14, 13. Give your answer to 2 decimal places

    Answer: 28.57

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