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Cornerstone · Grades 3–5 Keystones #1 6 February 2016 Skills week 1 of 7
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Five GCSE retrieval questions · 6 February 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 4⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 2x + 12 = 28

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

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 35 in the ratio 4:3

    Answer: 20 and 15
  5. 5. Statistics Mean

    Calculate the mean of: 33, 24, 19, 19, 19, 12, 31, 48. Give your answer to 2 decimal places

    Answer: 25.63

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