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Cornerstone · Grades 3–5 Keystones #1 11 March 2016 Skills week 1 of 7
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Five GCSE retrieval questions · 11 March 2016 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 2⁄4

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 5x + 9 = 59

    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 189 in the ratio 3:1:3

    Answer: 81, 27 and 81
  5. 5. Statistics Mean

    Find the mean of: 3, 4, 4, 19, 5

    Answer: 7

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