If `[[k+4, -1] , [3, k-6]] = [[a,-1] , 3,-4]]` then find the value of `a`

If A=[[2,4-1,k]] and A^(2)=0, then find the value of k.

If [[1,2],[3,4]] [[3,1],[2,5]]=[[7,11],[k,23]], then write the value of k.

If k,k+1,k+3 are in G.P then find the value of k

If   ( k-2 ) /( k + 3 ) = 4/9 , then find the value of k

If k, k + 1 and k + 3 are in G.P. then find the value of k.

If k+3, 5k-1 and 3k+2 are in A.P., find the value of k.

If 4:(k+3)::5:(k+5) find the value of k

(A) "4],[" 2.If " A=[[k,1,0],[3,5]]" is a singular matrix,then the value of "k" is equal to: "],[[" (A) "0," (B) "6," (C) "-6," (D) "6]]

if the lines (x - 1)/(-3) = ( y - 2)/(2k) = ( z -3)/(2) and (x -1) /(3k) = ( y - 5)/(1) = (z - 6 ) /(-5) are at night angle , then find the value of k .

The mode of data 1, 3, 12, 10, 8, 4, 5, 4, 3, 2, 1, 4 is 60 div k . Find the value of k