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Cornerstone · Grades 3–5 Keystones #1 15 February 2018 Skills week 1 of 7
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Five GCSE retrieval questions · 15 February 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 6x - 15 = 39

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Divide 180 in the ratio 3:1:2

    Answer: 90, 30 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 38, 27, 9, 18, 23, 15, 15, 50. Give your answer to 2 decimal places

    Answer: 24.38

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