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Cornerstone · Grades 3–5 Keystones #1 25 August 2020 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 August 2020 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄8 + 1⁄7

    Answer: 25⁄28
  2. 2. Algebra Two-step equations

    Solve: 2x + 9 = 25

    Answer: x = 8
  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 120 in the ratio 1:1:4

    Answer: 20, 20 and 80
  5. 5. Statistics Mean

    Calculate the mean of: 43, 32, 23, 48, 15, 35

    Answer: 32.7

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