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Cornerstone · Grades 3–5 Keystones #1 19 May 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 May 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 2⁄5

    Answer: 19⁄35
  2. 2. Algebra Two-step equations

    Solve: 7x - 18 = 31

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

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 140 in the ratio 4:1:2

    Answer: 80, 20 and 40
  5. 5. Statistics Mean

    Find the mean of: 10, 5, 9, 16

    Answer: 10

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