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Cornerstone · Grades 3–5 Keystones #1 14 February 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 14 February 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄6 + 4⁄7

    Answer: 15⁄14
  2. 2. Algebra Two-step equations

    Solve: 3x + 8 = 23

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

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 100 in the ratio 2:3

    Answer: 40 and 60
  5. 5. Statistics Mean

    Find the mean of: 4, 13, 14, 19

    Answer: 12.5

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