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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.  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?

 
 2.  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?

 
 3.  What is the radius of the incircle of the triangle whose sides measure 5, 12 and 13 units?

 
 4.  Three years back, a father was 24 years older than his son. At present the father is 5 times as old as the son. How old will the son be three years from now?

 
 5.  If the ratio of the sum of the first 6 terms of a G.P. to the sum of the first 3 terms of the G.P. is 9, what is the common ratio of the G.P?

 

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