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Cornerstone · Grades 3–5 Keystones #1 10 June 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 June 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 4⁄5

    Answer: 58⁄35
  2. 2. Algebra Two-step equations

    Solve: 4x + 14 = 26

    Answer: x = 3
  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

    Divide 80 in the ratio 2:1:1

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

    Find the mean of: 17, 18, 10, 17, 13

    Answer: 15