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Cornerstone · Grades 3–5 Keystones #1 14 November 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 November 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄8 + 4⁄6

    Answer: 31⁄24
  2. 2. Algebra Two-step equations

    Solve: 3x + 13 = 46

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Divide 161 in the ratio 3:2:2

    Answer: 69, 46 and 46
  5. 5. Statistics Mean

    Find the mean of: 18, 17, 7, 8

    Answer: 12.5

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