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Cornerstone · Grades 3–5 Keystones #1 16 November 2010 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 November 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 5⁄7

    Answer: 39⁄35
  2. 2. Algebra Two-step equations

    Solve: 2x + 11 = 25

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

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 36 in the ratio 1:2

    Answer: 12 and 24
  5. 5. Statistics Mean

    Calculate the mean of: 46, 50, 38, 31, 48, 18

    Answer: 38.5

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