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Cornerstone · Grades 3–5 Keystones #1 26 October 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 26 October 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄7 + 7⁄8

    Answer: 81⁄56
  2. 2. Algebra Two-step equations

    Solve: 3x + 7 = 37

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

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 25 in the ratio 1:4

    Answer: 5 and 20
  5. 5. Statistics Mean

    Find the mean of: 2, 4, 2, 18, 9

    Answer: 7

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