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Cornerstone · Grades 3–5 Keystones #1 21 May 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 May 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 7⁄8 + 2⁄6

    Answer: 29⁄24
  2. 2. Algebra Two-step equations

    Solve: 3x + 12 = 42

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Divide 171 in the ratio 4:3:2

    Answer: 76, 57 and 38
  5. 5. Statistics Mean

    Find the mean of: 4, 4, 7

    Answer: 5

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