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Cornerstone · Grades 3–5 Keystones #1 23 January 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 23 January 2014 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 1⁄4

    Answer: 19⁄28
  2. 2. Algebra Two-step equations

    Solve: 2x - 17 = 11

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 120 in the ratio 1:1:2

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

    Calculate the mean of: 43, 28, 28, 8, 44, 5, 29, 6. Give your answer to 2 decimal places

    Answer: 23.88

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