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Cornerstone · Grades 3–5 Keystones #1 31 July 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 31 July 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄12 + 3⁄12

    Answer: 5⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x - 10 = 60

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 216 in the ratio 3:4:1

    Answer: 81, 108 and 27
  5. 5. Statistics Mean

    Calculate the mean of: 18, 50, 45, 7, 25, 21, 14, 42

    Answer: 27.75

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