123:4:0:726:?

In each of the following questions, select the related letters/word/numbers from the given alternatives. 123:4:: 726:?

123 : 4 : : 726 : ?

Find the inverse of each of the matrices (if it exists ) {:[( 1,2,3),( 0,2,4),( 0,0,5)]:}

Find the inverse of each of the matrices (if it exists ) {:[( 1,2,3),( 0,2,4),( 0,0,5)]:}

Find the inverse of the following A=[[1,2,3],[0,2,4],[0,0,5]]

Find the inverse of the matrix (if it exists ) {:[( 1,2,3),( 0,2,4),( 0,0,5)]:}

Find the inverse of the matrix (if it exists): [[1,2,3],[0,2,4],[0,0,5]]