**Category : **3rd Class

It was a digital mechanical calculator invented by German mathematician and philosopher Gottfried Wilhelm Leibnitz around 1672 and completed in 1694. Pascal developed the machine because he had to help his father with his work as tax receiver. This was an improvement over the Pascaline. This machine was also able to perform multiplication and division and all the mathematical calculations. Leibnitz's machine used a stepped cylinder. This machine was also called stepped calculator.

**Leibnitz calculator was a calculating device. It was the improved form c which one of the following devices? **

(A) Abacus

(B) Napier's bones

(C) Pascaline

(D) All of these

(E) None of these

**Answer: (C)**

Explanation

Correct Option:

(C) Leibnitz calculator was the improved form of pascaline.

Incorrect Options:

(A) Abacus: Was the first calculating device and not the improved form Pascaline. Therefore option (A) is Incorrect.

(B) Napier's bones: Was the calculating device and not the improved ton of Pascaline. Therefore option (B) is Incorrect.

(D) Option (D) is Incorrect.

(E) Option (E) is Incorrect.

**Leibnitz's machine used a stepped cylinder. What was its other name? **

(A) Stepped calculator

(B) Stepped computer

(C) Stepped device

(D) All of these

(E) None of these

**Answer: (A)**

Explanation

Correct Option:

(A) Leibnitz's machine was also known as stepped calculator.

Incorrect Options:

(B) Stepped computer- is an Incorrect Option.

(C) Stepped device- is an Incorrect Option.

(D) Option (D) is Incorrect.

(E) Option (E) is Incorrect.

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