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Cornerstone · Grades 3–5 Keystones #1 18 November 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 18 November 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 3⁄4

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 8x - 6 = 26

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 66 in the ratio 2:1:3

    Answer: 22, 11 and 33
  5. 5. Statistics Mean

    Calculate the mean of: 47, 42, 48, 43, 26, 21. Give your answer to 2 decimal places

    Answer: 37.83

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