Information about-Napiers Bone
Category : 3rd Class
Information about- Napier's Bone
Napier's bone is an abacus created by John Napier in 17 AD for calculation of products and quotients of numbers. Sir John Napier was a great mathematician of Scotland. This was a manual device. Napier's bone is also called Napier's rod. It was made up of bones and rods. It was capable of doing all the four mathematical operations - addition, subtraction, {multiplication and division. Using the multiplication tables embedded in the rods, multiplication can be reduced to addition operations and division to subtractions.
Napier's bones was created by John Napier. From which country he belonged?
(A) England
(B) Sweden
(C) France
(D) Scotland
(E) Netherlands
Answer: (D)
Explanation
Correct Option:
(D) John Napier belonged to Scotland.
Incorrect Options:
(A) England : John Napier did not belong to England. Therefore, option (A) is incorrect.
(B) Sweden: He did not belong to Sweden. Therefore, option (B) is Incorrect.
(C) France : He did not belong to France. Therefore, option (C) is Incorrect.
(E) Netherlands: He did not belong to Netherlands. Therefore, option (E) is Incorrect.
Napier's bones was used for calculation. It was made up of bones and rods and was capable of doing all the four mathematical operations. What kind of device it was?
(A) Automatic
(B) Electronic
(C) Manual
(D) Electric
(E) None of these
Answer: (C)
Correct Option:
(C) It was a manual device.
Incorrect Options:
(A) Automatic : Napier's bones was a device of 16th century and it worked manually. That's why option (A) is Incorrect.
(B) Electronic : Napier's bones was made up of bones and rods and no electronic things were used. That's why option (B) is Incorrect.
(D) Electric : Napier's bones was a manual device. That's why option (D) is Incorrect.
(E) Option (E) is Incorrect.
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