## 50+ GMAT Math Formulas

This article covers most frequently needed math formulas for GMAT exam. These GMAT Math Formulas will be helpful for beginners for getting quickly ready for the exam. This is an All in one math formulas list for GMAT.   Formulas for powers or indices     Square Formulas   Cube Formulas   Special number zero […]

## Solving linear equations using Inverse Matrix

One of the important applications of Matrix is to solve linear equations.   So, lets see how to solve linear equation using Inverse of a Matrix.   Let us consider the example of following linear equations :   x + 2y = 3 ………… (Equation 1)   2x – y = 1 ………….. (Equation […]

## Find Inverse of Matrix using Minors, Cofactors and Adjoint

Finding Inverse of Matrix   Inverse of a matrix can be calculated using following steps :     Step 1 : Find the Matrix of Minors   Step 2 : Find the Matrix of Cofactors from the Matrix of Minors   Step 3 : Find the Adjoint matrix from Matrix of Cofactors   Step 4 […]

## Finding Adjoint of a matrix using Cofactor

Adjoint of matrix using Cofactor :   Adjoint of a matrix, represented as adj(A) can be obtained by just transposing the cofactor matrix.   Finding Cofactor of a matrix   Please click on below link for the post to find Cofactor of a matrix :   Finding Cofactor of a matrix using Minor   Example […]

## Finding Cofactor of a matrix using Minor

Cofactor of a matrix   Cofactor of a matrix can be calculated using Minor using following formula   Cij = (-1)i + j Mij   where Mij is the minor in the ith row, jth column of the matrix.   Note : Even power of (-1) is 1 and Odd power of (-1) is (-1)   […]