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Cornerstone · Grades 3–5 Keystones #1 4 October 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 October 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 2⁄4

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 2x - 10 = 0

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

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Share 85 in the ratio 4:1

    Answer: 68 and 17
  5. 5. Statistics Mean

    Find the mean of: 6, 20, 10

    Answer: 12

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