16 (number) 0 to 15 in each column. Sixteen is an even number and a square number. Sixteen is the fourth power of two. Sixteen is the only integer that equals "m" and "n", for some unequal integers "m" and "n" ("m" = 4, "n" = 2, or vice versa). It has this property because 2 = 2 × 2. It is also equal to 2 (see tetration). 16 is the base of the hexadecimal number system, which is used extensively in computer science. In Spanish and Portuguese, 16 is the first compound number (Spanish: "dieciséis", European Portuguese: "dezasseis", Brazilian Portuguese: "dezesseis");
Karel (given name) Karel (given name) Karel is a given name in Dutch and Czech, equivalent to Charles, meaning "Free Man". The name Karel (and its diminutives, Karlík, Karlíček, and Kája) appears frequently among the Czechs. In 2006, 124,784 Karels lived in the Czech Republic, making the name the thirteenth most popular Czech name. Between 1999 and 2002, the number of Karels in the Czech Republic dropped by 2.7%, and the name dropped out of the twenty most popular newborn child names. Famous Czechs with this given name include the poet Karel Hynek Mácha, the journalist Karel Havlíček Borovský, the writer Karel Čapek