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Cornerstone · Grades 3–5 Keystones #1 28 August 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 28 August 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄11 + 2⁄11

    Answer: 8⁄11
  2. 2. Algebra Two-step equations

    Solve: 2x - 14 = -6

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Divide 243 in the ratio 4:1:4

    Answer: 108, 27 and 108
  5. 5. Statistics Mean

    Find the mean of: 5, 11, 18

    Answer: 11.333333333333

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