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Cornerstone · Grades 3–5 Keystones #1 14 July 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 14 July 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄12 + 3⁄12

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

    Solve: 4x - 16 = 24

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

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

    Share 126 in the ratio 3:4

    Answer: 54 and 72
  5. 5. Statistics Mean

    Find the mean of: 2, 7, 20, 11

    Answer: 10

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