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Cornerstone · Grades 3–5 Keystones #1 9 November 2016 Skills week 1 of 7
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Five GCSE retrieval questions · 9 November 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄7 + 3⁄4

    Answer: 29⁄28
  2. 2. Algebra Two-step equations

    Solve: 2x + 7 = 27

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 104 in the ratio 3:1:4

    Answer: 39, 13 and 52
  5. 5. Statistics Mean

    Calculate the mean of: 22, 47, 44, 20, 28, 48, 19, 31. Give your answer to 2 decimal places

    Answer: 32.38

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