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Cornerstone · Grades 3–5 Keystones #1 31 October 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 31 October 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 1⁄6

    Answer: 25⁄42
  2. 2. Algebra Two-step equations

    Solve: 2x - 5 = 11

    Answer: x = 8
  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 50 in the ratio 4:1

    Answer: 40 and 10
  5. 5. Statistics Mean

    Calculate the mean of: 22, 22, 36, 7, 8, 19

    Answer: 19

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