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Cornerstone · Grades 3–5 Keystones #1 19 February 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 19 February 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄6 + 3⁄4

    Answer: 17⁄12
  2. 2. Algebra Two-step equations

    Solve: 8x - 13 = 35

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Share 48 in the ratio 1:2

    Answer: 16 and 32
  5. 5. Statistics Mean

    Calculate the mean of: 34, 25, 35, 27, 41, 17, 27, 21

    Answer: 28.4

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