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Cornerstone · Grades 3–5 Keystones #1 6 September 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 September 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄6 + 6⁄7

    Answer: 19⁄14
  2. 2. Algebra Two-step equations

    Solve: 5x + 5 = 55

    Answer: x = 10
  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 54 in the ratio 2:1

    Answer: 36 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 48, 5, 42, 7, 42, 27

    Answer: 28.5

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