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Cornerstone · Grades 3–5 Keystones #1 4 December 2013 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 December 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄8 + 3⁄4

    Answer: 9⁄8
  2. 2. Algebra Two-step equations

    Solve: 5x + 6 = 66

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

    Answer: 27, 27 and 54
  5. 5. Statistics Mean

    Calculate the mean of: 23, 11, 21, 12, 13, 40

    Answer: 20

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