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Cornerstone · Grades 3–5 Keystones #1 26 April 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 26 April 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄10 + 2⁄10

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

    Solve: 4x - 16 = 32

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 135 in the ratio 4:1:4

    Answer: 60, 15 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 27, 43, 40, 28, 48, 40, 39, 33

    Answer: 37.25

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