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Cornerstone · Grades 3–5 Keystones #1 22 December 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 22 December 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄12 + 1⁄12

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 6x + 9 = 51

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

    Calculate the hypotenuse when a = 9cm and b = 9cm

    Answer: 12.73cm
  4. 4. Ratio Sharing in a ratio

    Divide 77 in the ratio 3:1:3

    Answer: 33, 11 and 33
  5. 5. Statistics Mean

    Calculate the mean of: 6, 32, 17, 20, 16, 40

    Answer: 21.8

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