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Cornerstone · Grades 3–5 Keystones #1 8 February 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 8 February 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄12 + 2⁄12

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

    Solve: 4x - 10 = 50

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Divide 224 in the ratio 3:3:2

    Answer: 84, 84 and 56
  5. 5. Statistics Mean

    Calculate the mean of: 42, 49, 50, 47, 32, 38

    Answer: 43

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