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

Five GCSE retrieval questions · 3 April 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 5⁄7

    Answer: 65⁄42
  2. 2. Algebra Two-step equations

    Solve: 2x + 7 = 17

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Share 30 in the ratio 4:1

    Answer: 24 and 6
  5. 5. Statistics Mean

    Find the mean of: 3, 17, 7

    Answer: 9

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