Matrix Coding
Matrix is a set of elements laid out in tabular form in rows and columns.
Matrix coding is a method to represent the letters of English alphabet by two digits. One digit is represented by the corresponding row and the other digit is represented by the corresponding column.
The questions based on matrix coding consist of two matrices i.e. Matrix I and Matrix II. Matrix I has five columns and five rows marked from 0 to 4. Five letters appear in each column and row but different in order. Matrix II has five columns and five rows marked from 5 to 9. Five letters appear in different order in each column and row.
Example : A word is represented by only one set of numbers as given in any one of the alternatives. The sets of numbers given in the alternatives are represented by two classes of alphabets as in two matrices given below. The columns and rows of Matrix I are numbered – form 0 to 4 and that Matrix II are numbered from 5 to 9. A letter from these matrices can be represented first by its row and next by its column, e.g., ‘J’ can be represented by 01, 14, etc. and E can be represented by 55, 66 etc. Similarly, you have to identify the set for the word ‘OBJECT’.
Matrix  I  Matrix  II  


 67, 78, 00, 66, 31, 11
 75, 96, 22, 55, 44, 03
 86, 66, 14, 77, 10, 32
 98, 57, 43, 86, 30, 40
Solution : 75, 96, 22, 55, 44, 03
Example :
Matrix  I  Matrix  II  


 11, 31, 43, 85, 55
 22, 44, 30, 65, 99
 40, 02, 03, 96, 77
 24, 13, 14, 57, 66
Solution : 22, 44, 30, 65, 99