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

  1. 1. Number Adding fractions

    Calculate: 3⁄8 + 3⁄8

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 7x - 15 = 83

    Answer: x = 14
  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

    Divide 160 in the ratio 2:1:2

    Answer: 64, 32 and 64
  5. 5. Statistics Mean

    Calculate the mean of: 20, 21, 11, 22, 47, 50, 16. Give your answer to 2 decimal places

    Answer: 26.71

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