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Cornerstone · Grades 3–5 Keystones #1 19 October 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 19 October 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 4⁄8

    Answer: 5⁄4
  2. 2. Algebra Two-step equations

    Solve: 3x - 12 = 6

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 90 in the ratio 3:4:2

    Answer: 30, 40 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 11, 39, 14, 41, 9, 45

    Answer: 26.5

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