Find the G.C.F. & L.C.M. of 20 and 28.
Which of the following was the first antibiotic discovered by Alexander Fleming in 1928?
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Aaton Van Leewen Hock is famous for the discovery of ___.
Who invented the mouse of a computer?
Who invented the pendulum clock?
Stainless steel was invented by
Which of the following branches of mathematics was invented by Newton?
Where was paper invented?
Robert Hooke discovered cells by observing them in a ______.