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Cornerstone · Grades 3–5 Keystones #1 15 January 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 January 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄10 + 1⁄10

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

    Solve: 5x - 15 = 60

    Answer: x = 15
  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

    Divide 200 in the ratio 3:4:1

    Answer: 75, 100 and 25
  5. 5. Statistics Mean

    Calculate the mean of: 48, 31, 19, 13, 36, 41, 33

    Answer: 31.6

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