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Cornerstone · Grades 3–5 Keystones #1 6 November 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 6 November 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄5 + 1⁄5

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

    Solve: 6x + 3 = 27

    Answer: x = 4
  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 168 in the ratio 2:2:3

    Answer: 48, 48 and 72
  5. 5. Statistics Mean

    Calculate the mean of: 21, 31, 8, 15, 49, 15. Give your answer to 2 decimal places

    Answer: 23.17

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