Number 87

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[Chemistry]  The atomic number of Francium (Fr).

 

[Library]  ISBN-87 is the International Standard Book Number for books published in Denmark.

[Math.]  873 = 658,503 = (6+5+85+03)3.

 

[Phone]  The emergency telephone number dialing within Cape Verde.

 

[Sport]  The traditionally unlucky score in cricket. (Maybe it is of 13 runs less than 100).

 

[Tech.]  Octane (R+M)/2 antiknock index rating of unleaded gasoline for automobiles in the U.S.: 87, 88, 89, 90 and 91.

 

[Tech.]  The length (feet) of a standard 3-inch-diameter slinky, first designed by a naval engineer Richard James (Philadelphia, Pennsylvania, U.S.) and marketed in 1943.

 

[Tech.]  The “number system” code of an EAN-13 barcode for Netherlands’ products.

 

[Tech.]  Intel CPU family x86: 8086 (8008, 8080, 8085, 8086, 8087, 8088), which followed 4004 & 4040 and 80186 (80186/80C187, 80188, 80286/80287, 80386/80387, 80486/80487). The x87 is math co-processor.

 

[Tech.]  The lowest frequency (87.5 MHz) for an FM radio station, available for most commercial radios.


[Tech.]  Automobile Tire’s Speed Rating

Tire Rating

L

M

N

P

Q

R

S

Max. Speed (mph)

Max. Speed (kph)

75

120

81

130

87

140

93

150

100

160

106

170

112

180

Tire Rating

T

U

H

V

W

Y

 

Max. Speed (mph)

Max. Speed (kph)

118

190

124

200

130

210

149

240

168

270

186

300