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Cornerstone · Grades 3–5 Keystones #1 28 September 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 28 September 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄7 + 2⁄3

    Answer: 29⁄21
  2. 2. Algebra Two-step equations

    Solve: 8x - 18 = 38

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

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 210 in the ratio 4:3:3

    Answer: 84, 63 and 63
  5. 5. Statistics Mean

    Find the mean of: 17, 10, 12

    Answer: 13

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