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

  1. 1. Number Adding fractions

    Calculate: 1⁄6 + 4⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 8x - 13 = 51

    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 4:3

    Answer: 40 and 30
  5. 5. Statistics Mean

    Calculate the mean of: 35, 49, 24, 35, 46, 29

    Answer: 36.3

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