The 75 (number) reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

75 (number)

75 is the natural number following 74 and preceding 76.

List of numbers — Integers << 70 71 72 73 74 75 76 77 78 79 >>
Cardinal	seventy-five
Ordinal	75th (seventy-fifth)
Factorization
divisors	3, 5, 15, 25
Roman numeral	LXXV
Binary	1001011
Hexadecimal	4B

In mathematics

As the sum of the first five pentagonal numbers, seventy-five is a pentagonal pyramidal number. It is also a nonagonal number

It is also a Keith number, because it recurs in a Fibonacci-like sequence started from its base 10 digits: 7, 5, 12, 17, 29, 46, 75...

In other fields

Seventy-five is also:

• The atomic number of rhenium.
• The number of uniform polyhedra.
• The designation of Interstate 75, a freeway that runs from Florida to Michigan.
• The denomination of U.S. savings bonds with Adams's portrait.
• The registry of the U.S. Navy's nuclear aircraft carrier USS Harry S Truman (CVN-75), named after U.S. President Harry S. Truman.
• The year AD 75, 75 BC, or 1975.

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