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

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

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

    Solve: 4x - 12 = 40

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 5cm

    Answer: 12.08cm
  4. 4. Ratio Sharing in a ratio

    Divide 150 in the ratio 4:3:3

    Answer: 60, 45 and 45
  5. 5. Statistics Mean

    Calculate the mean of: 16, 25, 17, 46, 15, 17, 39

    Answer: 25

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