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Cornerstone · Grades 3–5 Keystones #1 16 April 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 April 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄12 + 3⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 6x + 6 = 42

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

    Answer: 12 and 18
  5. 5. Statistics Mean

    Find the mean of: 18, 20, 7

    Answer: 15

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