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

  1. 1. Number Adding fractions

    Add: 1⁄3 + 2⁄7

    Answer: 13⁄21
  2. 2. Algebra Two-step equations

    Solve: 6x + 7 = 37

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 77 in the ratio 4:1:2

    Answer: 44, 11 and 22
  5. 5. Statistics Mean

    Calculate the mean of: 30, 42, 42, 17, 16, 44, 43, 11. Give your answer to 2 decimal places

    Answer: 30.63

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