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Cornerstone · Grades 3–5 Keystones #1 18 December 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 18 December 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄8 + 4⁄6

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 2x + 13 = 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 30 in the ratio 1:2

    Answer: 10 and 20
  5. 5. Statistics Mean

    Find the mean of: 17, 16, 16, 13, 19

    Answer: 16.2

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