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Cornerstone · Grades 3–5 Keystones #1 30 January 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 30 January 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 3⁄4

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 3x - 12 = 12

    Answer: x = 8
  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

    Divide 145 in the ratio 2:2:1

    Answer: 58, 58 and 29
  5. 5. Statistics Mean

    Find the mean of: 10, 5, 17, 18, 10

    Answer: 12

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