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Cornerstone · Grades 3–5 Keystones #1 28 December 2020 Skills week 1 of 7
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Five GCSE retrieval questions · 28 December 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄9 + 3⁄9

    Answer: 7⁄9
  2. 2. Algebra Two-step equations

    Solve: 7x - 8 = 97

    Answer: x = 15
  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 112 in the ratio 3:1:4

    Answer: 42, 14 and 56
  5. 5. Statistics Mean

    Calculate the mean of: 13, 18, 15, 43, 23, 17

    Answer: 21.5

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