exam Maths Puzzle Numerical Ability

Use inductive reasoning to predict the next number in each sequence.

3, 7, 11, 15, _____________

1, -2, 4, -8 ________________

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exam Other Question

Well, there were no questions submitted for this area. I wish these questions were out of a textbook because then I would have an example that I could follow, but they are not. As Sketch the graph of a system with the following: x+2y<160, 3x+y<180, x>0, y>0.