A rectangular arrangement of number in rows and columns is called _______

Who gave the name 'matrix' to a rectangular arrangement of certain numbers in some rows and columns?

Interchanging of elements of rows and columns of a matrix is called.

Rohit drew a rectangular grid of 529 cells, arranged in 23 rows and 23 columns, and filled each cell with a number. The numbers with which he filled each cell were such that the numbers of each row taken from left to right formed an arithmetic series and the numbers of each column taken from top ot bottom also formed an arithmetic series. The seventh and the seventeenth numbers of the fifth row were 47 and 63 respectively, while the seventh and the seventeenth numbers of the fifteenth row were 53 and 77 respectively. What is the sum of all the numbers in the grid?

The tabular arrangment of elements in horizontal rows and vertical columns……………….