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Cornerstone · Grades 3–5 Keystones #1 6 December 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 6 December 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄6 + 1⁄6

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

    Solve: 5x + 13 = 28

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

    Calculate the hypotenuse when a = 8cm and b = 5cm

    Answer: 9.43cm
  4. 4. Ratio Sharing in a ratio

    Divide 66 in the ratio 1:1:4

    Answer: 11, 11 and 44
  5. 5. Statistics Mean

    Calculate the mean of: 25, 23, 13, 32, 46, 19

    Answer: 26.3

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