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Cornerstone · Grades 3–5 Keystones #1 12 February 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 12 February 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 5x - 10 = 10

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 70 in the ratio 2:2:1

    Answer: 28, 28 and 14
  5. 5. Statistics Mean

    Find the mean of: 4, 14, 9

    Answer: 9

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