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Cornerstone · Grades 3–5 Keystones #1 10 October 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 10 October 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 1⁄7

    Answer: 3⁄7
  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 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 27 in the ratio 2:1

    Answer: 18 and 9
  5. 5. Statistics Mean

    Calculate the mean of: 11, 33, 8, 46, 37, 44, 9

    Answer: 26.9

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