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Home > Self-Study Quizzes > Quiz GMAT Math practice - (5/36 questions - random) GMAT practice questions.  Once you complete the quiz you will see your score and explanation of the correct answer.  1.  What is the measure of the radius of the circle that circumscribes a triangle whose sides measure 9, 40 and 41? A) 6 B) 4 C) 24.5 D) 20.5 E)  12.5    2.  What is the radius of the incircle of the triangle whose sides measure 5, 12 and 13 units? A) 2 units B) 12 units C) 6.5 units D) 6 units E) 7.5 units    3.  The average weight of a group of 30 friends increases by 1 kg when the weight of their football coach was added. If average weight of the group after including the weight of the football coach is 31kgs, what is the weight of their football coach in kgs? A) 31 kg B) 61 kg C) 60 kg D) 62 kg E) 91 kg    4.  How many diagonals does a 63-sided convex polygon have? A) 3780 B) 1890 C) 3843 D) 3906 E) 1953    5.  The average wages of a worker during a fortnight comprising 15 consecutive working days was $ 90 per day. During the first 7 days, his average wages was $ 87/day and the average wages during the last 7 days was $ 92 /day. What was his wage on the 8th day? A) $ 83 B) $ 92 C) $ 90 D) $ 97 E) $ 104

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