Questions 14-15 refer to the following definition. a, b represents the remainder when a is divided by b.
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A. if the quantity in Column A is greater; B. if the quantity in Column B is greater; C. if the two quantities are equal; D. if the relationship cannot be determined from the information given.
If 5x + 13 = 31, what is the value of？（）
A.A B.B C.C D.D E.E
A、1.5 B、2 C、2.5 D、3 E、3.5
In the figure below, vertex Q of square OPQR is on a circle with center O. If the area of the square is 8, what is the area of the circle？（）
A、60 B、120 C、150 D、160 E、180
In the figure below, if the radius of circle O is 10, what is the length of diagonal AC of rectangle OABC（）
A、0.5 B、48 C、50 D、64 E、96
In the figure below, three circles of radius 1 are tangent to one another. What is the area of the shaded region between them（）
A.16 B.26 C.32 D.39 E.48
In the figure below, equilateral triangle ABC is inscribed in circle O, whose radius is 4. Altitude BD is extended until it intersects the circle at E. What is the length of DE？（）
In the figure at the right, ABCD is a square and AED is an equilateral triangle. If AB = 2, what is the area of the shaded region？（）
A.A B.B C.C D.D
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