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Cornerstone · Grades 3–5 Keystones #1 27 December 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 27 December 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄11 + 2⁄11

    Answer: 9⁄11
  2. 2. Algebra Two-step equations

    Solve: 7x - 12 = 51

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 3:2:1

    Answer: 63, 42 and 21
  5. 5. Statistics Mean

    Calculate the mean of: 41, 11, 11, 29, 40, 6

    Answer: 23

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