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Cornerstone · Grades 3–5 Keystones #1 26 July 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 26 July 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 4⁄5

    Answer: 21⁄20
  2. 2. Algebra Two-step equations

    Solve: 5x + 11 = 51

    Answer: x = 8
  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 108 in the ratio 1:1:4

    Answer: 18, 18 and 72
  5. 5. Statistics Mean

    Find the mean of: 7, 11, 12

    Answer: 10

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