What is 9x9?

In mathematics, 9x9 is a simple multiplication problem that results in the answer of 81. The number 9 is a single-digit number that is divisible by 1, 3, and itself. When multiplied by another single-digit number, such as 9, the product will be a two-digit number. In this case, multiplying 9 by 9 results in 81.

Additionally, 9x9 is related to the concept of square numbers, as 9 is a perfect square itself (3^2 = 9). The square of 9 is 81, which is the result of multiplying 9 by itself. The square of a number is found by multiplying the number by itself.

Overall, the multiplication of 9 by 9 to get 81 is a basic arithmetic operation that demonstrates the concept of multiplication, square numbers, and the properties of the number 9 in mathematics.