Number 42

A page of the Numeropedia - the Special Encyclopedia of Numbers

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[Chemistry]  The atomic number of Molybdenum (Mo).

 

[Geology]  The number of bridges connecting more than 100 islands over 126-mile distance of the Florida Keys.

 

[History]  Washington became the 42nd state of the U.S. on 11 November 1889.

 

[History]  The 42nd U.S. President: William Jefferson Clinton (Democrat, Arkansas, 1993-2001).

 

[History]  When U.S. President William McKinley was assassinated on 14 September 1901, Vice-President Theodore Roosevelt (1901-1909, born on 27 October 1858) became the youngest U.S. President at the age of 42 years 322 days.

   U.S. President John Fitzgerald Kennedy (1961-1963, born on 29 May 1917) was inaugurated in January 1961 and became the youngest elected U.S. President, at the age of 43 years 236 days.

 

[Math.]  Two consecutive sums of consecutive numbers:  9+10+11+12 = 13+14+15 = 42.

 

[Math.]  42 = 0!2+1!2+2!2+3!2.

 

[Math.]  A Catalan number: C5 = 42.

 

[Math.] 

 12×21 = 252 = 21×12             

12×42 = 504 = 21×24          24×21 =    504 = 42×12

12×63 = 756 = 21×36          24×63 = 1,512 = 42×36    

12×84 = 1,008 = 21×48       24×42 = 1,008 = 42×24

36×84 = 3,024 = 63×48       24×84 = 2,016 = 42×48

 

[Math.]  24×63 = 1,512 = 42×36.

 

[Math.]  12×483 = 5,796 = 42×138. Each equality uses each of 9 digits 1-9 once.

 

[Math.]  27,594 = 7×3942 = 73×9×42.

 

[Math.]  Repeatedly inserting numbers 42 between the digits 4 and 2 in the square number 4225 = 652 yields other squares 442225 = 6652, 44422225 = 66652, 444222225 = 666652, 44442222225 = 6666652

 

[Math.]  The denominator of the 6th Bernoulli number: B6 = 1/42.

 

[Math.]  The maximum perfect score of a International Mathematical Olympiad competition is 42.  It consists of 6 problems typically assigned 7 points or less depending on the difficulty levels.

 

[Measure]  The number of U.S. gallons in a petroleum barrel, by international agreement, approximately 158.987 liters or 35 (British imperial) gallons.

 

[Measure]  The net weight (g, grams or 1.48-1.50 oz)of a tea bag.

 

[Money]  The number of people at the signing of the Declaration of Independence in 1776, shown on the back of the relatively rare current U.S. $2 bill. The front figures the portrait of the 3rd U.S. President Thomas Jefferson.

 

[Movie]  Name of TV show/series or movie: “42nd Street”.

 

[Phone]  International telephone dialing code for Czechoslovakia. Now, 420 for Czech Republic and 421 for Slovakia.

 

[Science]

American system

British system

Number

*****

tredecillion

1078

tredecillion

septillion

1042

septillion

quadrillion

1024

quadrillion

*****

1015

 

[Sport]  The maximum length (inches) of a baseball bat. (Not over 2¾ inches in diameter at the thickest part.)

 

[Sport]  The loft angle of iron golf clubs is increased by 4o from the vertical, from 2-iron to 9-iron; for pitching wedge is 52o and sand wedge 58o.

2-iron: 18o         3-iron: 22o     4-iron: 26o      5-iron: 30o

6-iron: 34o         7-iron: 38o     8-iron: 42o      9-iron: 46o.

 

[Tech.]  The “number system” code of an EAN-13 barcode for German’s products: 40, 41, 42, 43 and 44.

 

[Zip]  The values of the US non-denominated first-class postage stamps and later values, for the first ounce, starting 14 September 1975 at 10¢ to 44¢, in May 2009.  

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42.195

[Sport]  The standardized distance of the marathon race at the 1924 Olympic Games (Paris, France) was the length first run during the 1908 Olympic Games (London, England). It is not an even distance in either kilometers or miles (42.195 kilometers = 26 miles 385 yards). The distance of the first marathon race is even 40 km at the first modern 1896 Olympic Games (Athens, Greece).

 

42.67

[Sport]  The minimum diameter of a golf ball: 42.67 mm.

 

39 & 42

[History]  The 39th U.S. President: James Earl Carter, Jr. (Democratic, Georgia, 1977-1981).

His Vice President, Walter Frederick Mondale (Minnesota), was the 42nd U.S. Vice President.

 

42 & 45

[History]  The 42nd U.S. President: William Jefferson Clinton (Democrat, Arkansas, 1993-2001).

His Vice President, Albert Arnold “Al” Gore, Jr. (Tennessee), was the 45th U.S. Vice President.