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Cornerstone · Grades 3–5 Keystones #1 11 May 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 May 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 3⁄4

    Answer: 17⁄12
  2. 2. Algebra Two-step equations

    Solve: 6x - 9 = 45

    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 63 in the ratio 4:3

    Answer: 36 and 27
  5. 5. Statistics Mean

    Calculate the mean of: 25, 30, 40, 15, 21, 11, 18. Give your answer to 2 decimal places

    Answer: 22.86

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