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Cornerstone · Grades 3–5 Keystones #1 29 July 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 29 July 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 2⁄7

    Answer: 13⁄21
  2. 2. Algebra Two-step equations

    Solve: 7x + 11 = 81

    Answer: x = 10
  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 264 in the ratio 3:4:4

    Answer: 72, 96 and 96
  5. 5. Statistics Mean

    Find the mean of: 3, 7, 5

    Answer: 5

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