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Cornerstone · Grades 3–5 Keystones #1 25 January 2023 Skills week 1 of 7
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Five GCSE retrieval questions · 25 January 2023 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 3⁄7

    Answer: 5⁄7
  2. 2. Algebra Two-step equations

    Solve: 5x + 7 = 47

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

    Calculate the hypotenuse when a = 10cm and b = 11cm

    Answer: 14.87cm
  4. 4. Ratio Sharing in a ratio

    Divide 72 in the ratio 2:1:1

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

    Calculate the mean of: 25, 7, 47, 37, 36, 13, 27, 7

    Answer: 24.9

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