exam Maths Puzzle Numerical Ability

I tried using one of your solvers for the following problem and it gave me an error and said solution not found so if you could help that would be great!

Find the solution of the system

y = x^2 + 5

and

y = 2x + 4

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exam Other Question

There are 4 red, 4 white, 4 blue and 4 yellow balls in a bag (a total of 16 balls). They are picked at random. How many times you have to pick the balls (one at a time) so that you have at least one ball of each color in your hand?

Thank you.
o.k. o.k. last one today I promise!

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