I did fairly well in both. GPA 8.5/10 in math (Must be in top 10% in Math. I fared poorer in other core engineering courses). Economics was good. Top 5%.
Math from my engineering curriculum,
Math 1. Matrices, 3D analytical geometry, Differential calculus geometric application, Fn of several variables, ODE
Math 2 Multiple integral, vector calculus, Analytic functions, Complex integration, statistics
Math 3 Partial differential equations, Fourier series, boundary value problems, Laplace and Fourier transforms
Math 4 Probability and random variables, random processes, Correlation functions and spectral densities
Economics from my PGPM
Macroeconomics
Microeconomics