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Cornerstone · Grades 3–5 Keystones #1 12 February 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 12 February 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 2⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 2x - 9 = 11

    Answer: x = 10
  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 150 in the ratio 1:3:2

    Answer: 25, 75 and 50
  5. 5. Statistics Mean

    Calculate the mean of: 36, 27, 24, 32, 31, 31, 42, 18. Give your answer to 2 decimal places

    Answer: 30.13

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