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When was the logarithm that led to the slide rule discovered?

1614

1200

1468

1249

Who discovered the logarithm that "made it possible to perform multiplications and divisions by addition and subtraction"?

John Napier

Edmund Gunter

William Oughtred

Who developed the number line "in which the positions of the numbers were proportional to their logs"?

Edmund Gunter

John Napier

William Oughtred

Fill in the Blank: "____________________ simplified things further by taking two of Gunter's lines and sliding them relative to each other thus eliminating the dividers."

William Oughtred

Edmund Gunter

John Napier

What is a Mannheim?

"a standard single-face rule with scales to solve problems in multiplication, division, squares, square roots, reciprocals, trigonometry, and logarithms"

"the single sided rule similar to a Polyphase but with and inverted A scale (typically labeled R) instead of an inverted C scale (CI) "

"a rule with the trigonometric scales (S, ST, T) marked in degrees and tenths of a degree"

What is a Duplex?

"a double-faced rule. Typically added three folded scales (CF, CIF, DF) to those of the Polyphase rule to make many problems easier to solve"

"the single sided rule similar to a Polyphase but with and inverted A scale (typically labeled R) instead of an inverted C scale (CI)"

"a rule with that read both common and natural logs"

What is a Trig?

"a rule with scales for solving trigonometry problems (S, ST, T)"

"a rule with the trigonometric scales (S, ST, T) marked in degrees and tenths of a degree"

"a rule with scales for raising numbers to powers. (Scales usually started with LL)"

Which one is a "Sterling Slide Rule"?

Which one is a "Mannheim Polyphase Slide Rule"?

Which one is a "Concise Pocket Circular Slide Rule"?

Which one is a "Nuclear Bomb Effects Computer"?

Which one is a "Pickett 14 U.S. Military Slide Rule"?