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Cornerstone · Grades 3–5 Keystones #1 21 January 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 21 January 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄10 + 1⁄10

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 2x + 13 = 23

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 30 in the ratio 1:2

    Answer: 10 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 27, 49, 21, 11, 40, 35

    Answer: 30.5

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