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Cornerstone · Grades 3–5 Keystones #1 22 February 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 22 February 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 3⁄6

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 7x + 14 = 42

    Answer: x = 4
  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

    Share 33 in the ratio 1:2

    Answer: 11 and 22
  5. 5. Statistics Mean

    Find the mean of: 11, 11, 6, 3, 4

    Answer: 7

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