exam Maths Puzzle Numerical Ability

Solve for q:
g+q=r

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exam Other Question

? is
There are 9 cows and 4 pins, I have to get the 9 cows in the 4 pins with out using the same number twice, also there can not be any preg. cows or any 1/2 cows? Solve 3x^2 - 7x - 13 = 0.

And, then find the x-intercepts of f(x) = 3x^2 - 7x - 13

Thank you.