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");
Ruby (given name) Ruby (given name) Ruby is a predominantly feminine given name taken from the name of the gemstone ruby. The name of the gemstone comes from the Latin "ruber", meaning "red". The ruby is the birthstone for the month of July. The name first came into wide use for girls in the late Victorian era along with other jewel names. Ruby is a currently popular name in English-speaking countries. It was the second most popular name given to baby girls in England and Wales in 2009, was the 24th most popular name given to baby girls born in Scotland in 2009;