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Cornerstone · Grades 3–5 Keystones #1 21 December 2018 Skills week 1 of 7
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Five GCSE retrieval questions · 21 December 2018 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄7 + 1⁄7

    Answer: 5⁄7
  2. 2. Algebra Two-step equations

    Solve: 7x + 9 = 58

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 203 in the ratio 2:3:2

    Answer: 58, 87 and 58
  5. 5. Statistics Mean

    Calculate the mean of: 6, 9, 7, 41, 25, 29, 20

    Answer: 19.6

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