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Cornerstone · Grades 3–5 Keystones #1 25 October 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 25 October 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄10 + 1⁄10

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 3x - 8 = 16

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

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 70 in the ratio 2:3

    Answer: 28 and 42
  5. 5. Statistics Mean

    Find the mean of: 17, 10, 12, 11, 13

    Answer: 12.6

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