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Cornerstone · Grades 3–5 Keystones #1 16 October 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 16 October 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄6 + 1⁄6

    Answer: 1⁄3
  2. 2. Algebra Two-step equations

    Solve: 7x + 6 = 76

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Share 36 in the ratio 3:1

    Answer: 27 and 9
  5. 5. Statistics Mean

    Calculate the mean of: 33, 11, 11, 12, 44, 10, 14, 27

    Answer: 20.3

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