👉 Quadrigenarious is a concept in mathematics that refers to a set of numbers that can be expressed as sums of three distinct squares. This means that if you have two numbers, one of which is a square (for example, 4 and -8), then the other two numbers must also be squares (for example, 2 and 1). The set of all such numbers forms a group under addition. For instance, consider the numbers 3, 5, and 7.