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Cornerstone · Grades 3–5 Keystones #1 25 January 2021 Skills week 1 of 7
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Five GCSE retrieval questions · 25 January 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 7x + 15 = 43

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

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Share 75 in the ratio 2:3

    Answer: 30 and 45
  5. 5. Statistics Mean

    Find the mean of: 6, 16, 14

    Answer: 12

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