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Cornerstone · Grades 3–5 Keystones #1 2 February 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 February 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄8 + 1⁄8

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

    Solve: 6x - 10 = 44

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 25 in the ratio 4:1

    Answer: 20 and 5
  5. 5. Statistics Mean

    Calculate the mean of: 20, 44, 11, 43, 18, 19, 11. Give your answer to 2 decimal places

    Answer: 23.71

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