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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.  A wheel of a car of radius 21 cms is rotating at 600 RPM. What is the speed of the car in km/hr? A) 79.2 km/hr B) 47.52 km/hr C) 7.92 km/hr D) 39.6 km/hr E) 3.96 km/hr    2.  What is the sum of all 3 digit numbers that leave a remainder of '2' when divided by 3? A) 897 B) 164,850 C) 164,749 D) 149,700 E) 156,720    3.  If the mean of numbers 28, x, 42, 78 and 104 is 62, then what is the mean of 128, 255, 511, 1023 and x? A) 395 B) 275 C) 355 D) 415 E) 365    4.  What is the equation of a circle of radius 6 units centered at (3, 2)? A)  x2 + y2 + 6x – 4y = 23 B)  x2 + y2 - 6x + 4y = 23 C)  x2 + y2 + 6x + 4y = 23 D)  x2 + y2 - 6x – 4y = - 23 E)  x2 + y2 - 6x – 4y = 23    5.  The average age of a group of 10 students was 20. The average age increased by 2 years when two new students joined the group. What is the average age of the two new students who joined the group? A) 22 years B) 30 years C) 44 years D) 32 years E) None of these

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