exam Maths Puzzle Numerical Ability

triangle ABC is inscribed in a circle. given that AB is a 40 degree arc and ABC is a 50 degree angle, find the sizes of the other arcs and angles in the figure.

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exam Other Question
Given f(x)=-x^3+x^2+3x+4, find f(-1), f(0), and f(1). The sum of two numbers is 48. The difference between three times the smaller number and the larger number is 16. Find the numbers.