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Cornerstone · Grades 3–5 Keystones #1 18 February 2018 Skills week 1 of 7
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Five GCSE retrieval questions · 18 February 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄6 + 4⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 3x + 13 = 28

    Answer: x = 5
  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 140 in the ratio 3:1:3

    Answer: 60, 20 and 60
  5. 5. Statistics Mean

    Find the mean of: 16, 12, 15, 19, 13

    Answer: 15

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