6
Q:

Find the G.C.F. & L.C.M. of 20 and 28.

 

A) 20,280 B) 5,280
C) 10,140 D) 4,140

Answer:   B) 5,280



Explanation:
Subject: Inventions
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Q:

Which of the following was the first antibiotic discovered by Alexander Fleming in 1928?

A) Penicillin B) Prontosil
C) Streptomycin D) Tetracyline
 
Answer & Explanation Answer: A) Penicillin

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Q:

Aaton Van Leewen Hock is famous for the discovery of ___.

A) Microscope B) Nylon
C) Laser D) Radio valve
 
Answer & Explanation Answer: A) Microscope

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0 536
Q:

Who invented the mouse of a computer?

A) John Backus B) Charles Babbage
C) Douglas Engelbart D) Simon Colton
 
Answer & Explanation Answer: C) Douglas Engelbart

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0 370
Q:

Who invented the pendulum clock?

A) Galileo Galilei B) Christiaan Huygens
C) Frederick Jones D) Davidson
 
Answer & Explanation Answer: B) Christiaan Huygens

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1 485
Q:

Stainless steel was invented by

A) William Howard Livens B) Joseph Aspdin
C) Harry Brearley D) James Dyson
 
Answer & Explanation Answer: C) Harry Brearley

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Q:

Which of the following branches of mathematics was invented by Newton?

A) Calculus B) Logic
C) Algebra D) Geometry
 
Answer & Explanation Answer: A) Calculus

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Q:

Where was paper invented?

A) China B) India
C) Zambia D) Germany
 
Answer & Explanation Answer: A) China

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1 381
Q:

Robert Hooke discovered cells by observing them in a ______.

A) onion peel B) cork slice
C) pond water   D) No option is correct
 
Answer & Explanation Answer: B) cork slice

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