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Cornerstone · Grades 3–5 Keystones #1 31 October 2021 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 31 October 2021 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 2⁄3

    Answer: 17⁄12
  2. 2. Algebra Two-step equations

    Solve: 7x + 7 = 28

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

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 40 in the ratio 1:2:1

    Answer: 10, 20 and 10
  5. 5. Statistics Mean

    Calculate the mean of: 15, 19, 50, 15, 44, 30

    Answer: 28.8

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