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In a vigesimal place system, twenty individual numerals (or digit symbols) are used, ten more than in the decimal system. One modern method of finding the extra needed symbols is to write ten as the letter A, or A 20, where the 20 means base 20, to write nineteen as J 20, and the numbers between with the corresponding letters of the alphabet.
The first series, which is aimed at four- to five-year-olds, comprised ten episodes focusing on the numbers 1-10, in order; each episode opened with Lolita introducing herself to the viewer, and pulling the number for the episode off its string (which was hanging from the studio ceiling), then pushing it into its correct hole in a wall, and singing the main theme, One to Ten, as each of its ...
Mr. Snuffleupagus; Sesame Street character: First appearance: Episode 0276 (November 15, 1971) Performed by: Jerry Nelson (1971–1978) Michael Earl Davis (1978–1981) Martin P. Robinson (1981–present)
The order of the natural numbers shown on the number line. A number line is a graphical representation of a straight line that serves as spatial representation of numbers, usually graduated like a ruler with a particular origin point representing the number zero and evenly spaced marks in either direction representing integers, imagined to extend infinitely.
Clip art (also clipart, clip-art) is a type of graphic art. Pieces are pre-made images used to illustrate any medium. Today, clip art is used extensively and comes in many forms, both electronic and printed.
In some countries, the number 20 is used as an index in measuring visual acuity. 20/20 indicates normal vision at 20 feet, although it is commonly used to mean "perfect vision" in countries using the Imperial system. (The metric equivalent is 6/6.)
Count von Count (known simply as the Count) is a Muppet character on the PBS/HBO children's television show Sesame Street. He is meant to parody Bela Lugosi 's vampiric character, Count Dracula . His first appearance on the show was in the 4th season premiere in 1972, where he counts blocks in a sketch with Bert and Ernie .
The smallest number of colors needed for an edge coloring of a graph G is the chromatic index, or edge chromatic number, χ ′ (G). A Tait coloring is a 3-edge coloring of a cubic graph . The four color theorem is equivalent to the assertion that every planar cubic bridgeless graph admits a Tait coloring.