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Cornerstone · Grades 3–5 Keystones #1 15 December 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 15 December 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 2⁄3

    Answer: 17⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x + 7 = 35

    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

    Divide 208 in the ratio 1:4:3

    Answer: 26, 104 and 78
  5. 5. Statistics Mean

    Calculate the mean of: 45, 23, 20, 35, 44, 37, 41

    Answer: 35

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