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Cornerstone · Grades 3–5 Keystones #1 24 December 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 24 December 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄10 + 4⁄10

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 6x + 7 = 79

    Answer: x = 12
  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 180 in the ratio 2:2:1

    Answer: 72, 72 and 36
  5. 5. Statistics Mean

    Find the mean of: 9, 3, 18, 18

    Answer: 12

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