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Cornerstone · Grades 3–5 Keystones #1 30 August 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 30 August 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄9 + 1⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 3x + 14 = 23

    Answer: x = 3
  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 48 in the ratio 1:2

    Answer: 16 and 32
  5. 5. Statistics Mean

    Calculate the mean of: 48, 32, 47, 27, 31, 21, 38. Give your answer to 2 decimal places

    Answer: 34.86

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