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Maria is taller than George, and Mark is shorter than Maria. Which of these statements is accurate?

It is impossible to work out whether Mark or George is taller
Mark and George are the same height
Mark is taller than George
George is taller than Mark

Fact Lab

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Interesting fact:

American psychologist David Wechsler said that, "Intelligence is an individual's internally diverse and global ability to consciously act, think and effectively adapt to the environment.”