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Cornerstone · Grades 3–5 Keystones #1 18 August 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 August 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 1⁄3

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

    Solve: 5x - 15 = 60

    Answer: x = 15
  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 176 in the ratio 4:3:1

    Answer: 88, 66 and 22
  5. 5. Statistics Mean

    Calculate the mean of: 32, 33, 25, 30, 30, 15, 49, 42

    Answer: 32

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