2×5

2×5 is a notation used to denote the product of two and five in arithmetic. The symbol × represents multiplication, so 2×5 is read as "two times five" or "two by five." As a result, 2×5 equals 10. The operation is commutative, so 5×2 also equals 10. Beyond simple multiplication, the expression is commonly used to describe dimensions and shapes in various contexts.

In geometry and combinatorics, a 2×5 rectangle has 2 rows and 5 columns, comprising 10 unit squares if the unit is one square. This makes the area 2×5 = 10 square units. The same notation is used in linear algebra to describe a 2×5 matrix, which contains 2 rows and 5 columns and hence 10 entries arranged in a grid. The concept of a 2×5 object is tied to discrete grids and arrays, where the order of dimensions matters for structure even though the total count of cells or elements remains 10.

Applications of the 2×5 designation appear in education, design, and computing. It is used to describe grid layouts, pixel arrays, seating plans, and small matrices in programming. When discussing products, dimensions, or arrangements, 2×5 provides a concise way to convey both the size and the multiplicative result of combining the two factors. See also dimensions, matrices, and grid layouts for related topics.