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Cornerstone · Grades 3–5 Keystones #1 25 January 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 25 January 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 3⁄7

    Answer: 16⁄21
  2. 2. Algebra Two-step equations

    Solve: 3x + 10 = 28

    Answer: x = 6
  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 110 in the ratio 4:4:3

    Answer: 40, 40 and 30
  5. 5. Statistics Mean

    Find the mean of: 19, 15, 9, 4, 3

    Answer: 10

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