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

  1. 1. Number Adding fractions

    Calculate: 4⁄6 + 1⁄6

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

    Solve: 3x - 17 = 7

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 7cm

    Answer: 12.21cm
  4. 4. Ratio Sharing in a ratio

    Divide 90 in the ratio 2:2:1

    Answer: 36, 36 and 18
  5. 5. Statistics Mean

    Find the mean of: 8, 9, 2, 20

    Answer: 9.75

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