exam Maths Puzzle Numerical Ability

find the constant of variation k.
m varies directly with n; m - 144 when n = 8.

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exam Other Question

factoring: quadratic equations and completing the square
a^6-4a^3-21=0
A U.S. Department of Justice report included the claim that "in spouse murder cases, wife defendants were less likely to be convicted than husband defendants." Sample data consiste