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Cornerstone · Grades 3–5 Keystones #1 17 June 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 June 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 2⁄4

    Answer: 13⁄14
  2. 2. Algebra Two-step equations

    Solve: 3x - 20 = 10

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 174 in the ratio 1:3:2

    Answer: 29, 87 and 58
  5. 5. Statistics Mean

    Calculate the mean of: 44, 46, 50, 25, 11, 7

    Answer: 30.5

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