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Cornerstone · Grades 3–5 Keystones #1 24 June 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 24 June 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 1⁄3

    Answer: 16⁄21
  2. 2. Algebra Two-step equations

    Solve: 2x + 3 = 21

    Answer: x = 9
  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 144 in the ratio 2:4:3

    Answer: 32, 64 and 48
  5. 5. Statistics Mean

    Find the mean of: 19, 11, 5, 15

    Answer: 12.5

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