14. Integer. The square root of 16 is 4, and the final result is -4. Integers consist of positive and negative whole numbers along with 0.
15. Irrational. The number pi is irrational, and so is any number in the form k*pi where k is a real number. We cannot express this number in fraction form where both parts of the fraction are integers.
16. Rational. Repeating decimals can be expressed in fraction form a/b with a,b as integers and b is nonzero. In this case, the given decimal number is equivalent to 106/11.