Anxiety Disorder Statistics. Anxiety Disorders affect 18.1 percent of adults in the United States (approximately 40 million adults between the ages of 18 to 54).
Perfect square. Perfect square is an element of algebraic structure which is equal to the square of another element. Square number, a perfect square integer.
Number 6 is A Perfect Number. The Pythagoreans acknowledged number 6 to be the first perfect number. In mathematics a perfect number is when all the numbers divisors (excluding the number itself) are added, the sum equals the number itself. In addition when including the number itself and dividing by two the result is the number itself.