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Cornerstone · Grades 3–5 Keystones #1 13 January 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 13 January 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄12 + 1⁄12

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 7x - 15 = 62

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 90 in the ratio 2:1

    Answer: 60 and 30
  5. 5. Statistics Mean

    Find the mean of: 10, 5, 7, 10

    Answer: 8

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