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Cornerstone · Grades 3–5 Keystones #1 28 November 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 28 November 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 3⁄8

    Answer: 23⁄40
  2. 2. Algebra Two-step equations

    Solve: 6x + 6 = 24

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

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Share 21 in the ratio 1:2

    Answer: 7 and 14
  5. 5. Statistics Mean

    Find the mean of: 24, 6, 6, 4

    Answer: 10

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