0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 are the ten numbers that make up every other number! Eight is the eighth number in the numeral system and it also one of the most uniquely shaped and recognizable numbers. Eight is the third number that stays the same in appearance whether it is right-side up or upside down. American stop signs are hexagons.
A cube has eight corners and eight pints make a gallon. A lot of things include eight of something. For example, “an eight” is a racing boat that contains eight oars; its crew is also called “an eight.” Some large engines have eight cylinders and there are usually eight people on a tug-of-war team.
A lot of words that being with “oct” are related to the number eight. For example, an octet is a group of eight musicians and an octagon has eight sides. In music, an octave is the interval between two notes when the higher note has twice the frequency of the lower note. On a piano keyboard this corresponds to an interval of eight white notes namely: C D E F G A B C.
“Pieces of eight” is common pirate slang for gold and treasure. This term originated from the Spanish silver coins called “piastre” which were used in the 1600s and 1700s. Piastres were marked with the number 8 because they were worth eight reals (Spanish currency at the time). The modern day U.S. dollar sign $ is believed to have been derived from the figure 8 as it looked when it appeared on the “pieces of eight.”
Below are five facts about the number eight: