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Cornerstone · Grades 3–5 Keystones #1 22 March 2012 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 March 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄6 + 2⁄5

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 2x + 15 = 29

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 125 in the ratio 2:1:2

    Answer: 50, 25 and 50
  5. 5. Statistics Mean

    Find the mean of: 1, 6, 13, 10, 5

    Answer: 7

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