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Cornerstone · Grades 3–5 Keystones #1 29 December 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 29 December 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄8 + 1⁄8

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 5x - 17 = 23

    Answer: x = 8
  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 70 in the ratio 2:3:2

    Answer: 20, 30 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 14, 18, 33, 45, 28, 22. Give your answer to 2 decimal places

    Answer: 26.67

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