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Cornerstone · Grades 3–5 Keystones #1 29 November 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 29 November 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄7 + 1⁄6

    Answer: 37⁄42
  2. 2. Algebra Two-step equations

    Solve: 5x + 4 = 64

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Share 55 in the ratio 2:3

    Answer: 22 and 33
  5. 5. Statistics Mean

    Find the mean of: 19, 7, 9, 15

    Answer: 12.5

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