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

Q:

Who Invented Traffic Signal ?

A) Lewis Edson Waterman	B) Levi Strauss
C) Percy LeBaron Spencer	D) Garrett Augustus Morgan

Answer & Explanation Answer: D) Garrett Augustus Morgan

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0 2285

Q:

Who Invented Piano ?

A) Bartolomeo Cristofori di Francesco	B) Ruth Graves Wakefield
C) Adolf Gaston Eugen Fick	D) Jacques Cousteau

Answer & Explanation Answer: A) Bartolomeo Cristofori di Francesco

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2 2844

Q:

Who Invented The World Wide Web ?

A) Sir Timothy John	B) Earle Dickson
C) James Rineose	D) Laszlo Jozsef Biro

Answer & Explanation Answer: A) Sir Timothy John

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0 2987

Q:

Lift was invented by

A) Otis	B) Domagk
C) Lee De Forest	D) None of these

Answer & Explanation Answer: A) Otis

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0 2834

Q:

Typewriter was invented by

A) Shockley	B) Sholes
C) Howe	D) None of these

Answer & Explanation Answer: B) Sholes

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1 3498

Q:

Air conditioner was discovered by

A) Edison	B) Wilson
C) Carrier	D) Roentgen

Answer & Explanation Answer: C) Carrier

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5 4298

Q:

Who invented the battery?

A) John Wilkinson	B) Alessandro Volta
C) James Hargreaves	D) Thomas Edison

Answer & Explanation Answer: B) Alessandro Volta

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0 1940

Q:

Atomic theory was devised by

A) Mosley	B) John Dalton
C) Daimler	D) None of these

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

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