book Maths Puzzle Numerical Ability

Given the following measures of a vertex angle of a regular polygon,determine how many sides it has.

A.150 B.156 C.174 D.178

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book Other Question

Please help me solve this equation.

x^2/3-x-1/6=0 Can someone help me with this problem?

A tree casts a shadow that measures 5 m. At the same time, a meter stick casts a shadow that is 0.4 m long. How tall is the tree?

Thanks,
Lyn