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Cornerstone · Grades 3–5 Keystones #1 8 March 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 March 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 2⁄8

    Answer: 7⁄12
  2. 2. Algebra Two-step equations

    Solve: 5x - 15 = 50

    Answer: x = 13
  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

    Share 54 in the ratio 2:1

    Answer: 36 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 15, 5, 22, 9, 5, 9, 42. Give your answer to 2 decimal places

    Answer: 15.29

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