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Cornerstone · Grades 3–5 Keystones #1 14 January 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 14 January 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄6 + 1⁄6

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

    Solve: 2x + 6 = 30

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

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

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

    Divide 168 in the ratio 3:3:1

    Answer: 72, 72 and 24
  5. 5. Statistics Mean

    Find the mean of: 5, 2, 6

    Answer: 4.3333333333333

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