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Cornerstone · Grades 3–5 Keystones #1 13 October 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 13 October 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄8 + 3⁄8

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 7x + 9 = 51

    Answer: x = 6
  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 90 in the ratio 3:2

    Answer: 54 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 27, 20, 19, 33, 29, 37, 42, 11

    Answer: 27.25

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