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Cornerstone · Grades 3–5 Keystones #1 19 December 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 19 December 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 2⁄7

    Answer: 4⁄7
  2. 2. Algebra Two-step equations

    Solve: 8x - 10 = 30

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Share 65 in the ratio 3:2

    Answer: 39 and 26
  5. 5. Statistics Mean

    Calculate the mean of: 14, 26, 45, 30, 33, 8, 24, 41

    Answer: 27.6

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