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Cornerstone · Grades 3–5 Keystones #1 10 September 2017 Skills week 1 of 7
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Five GCSE retrieval questions · 10 September 2017 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 2⁄3

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 3x - 15 = -3

    Answer: x = 4
  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 270 in the ratio 2:2:1

    Answer: 108, 108 and 54
  5. 5. Statistics Mean

    Find the mean of: 9, 10, 10, 24, 2

    Answer: 11

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