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Cornerstone · Grades 3–5 Keystones #1 20 August 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 August 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄7 + 3⁄7

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

    Solve: 2x - 15 = -1

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 50 in the ratio 3:2

    Answer: 30 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 41, 20, 41, 46, 37, 30

    Answer: 35.8

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