Resolution: table unique column, Stack overflow is a community of 7.0 million programmers, just like you, helping each other. join them; it only takes a minute:. Math times table - math salamanders, Welcome to the math salamanders math times table area. here you will find a wide range of free printable times table worksheets, times table tests and times table. Krypton - periodic table elements chemistry, The chemical element krypton is classed as a noble gas and a nonmetal. it was discovered in 1898 by william ramsay and his assistant morris travers..