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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.

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

If m, s are the average and standard deviation of integers a, b, c, and d, is s > 0?

(1) m > a

(2) a + b + c + d = 0

	A) Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient to answer the question asked.
	B) Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient to answer the question asked.
	C) BOTH statements (1) and (2) TOGETHER are sufficient to answer the question asked, but NEITHER statement ALONE is sufficient to answer the question asked.
	D) EACH statement ALONE is sufficient to answer the question asked.
	E) Statements (1) and (2) TOGETHER are NOT sufficient to answer the question asked, and additional data specific to the problem are needed.

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

The length of a rope, to which a cow is tied, is increased from 19m to 30m. How much additional ground will it be able to graze? Assume that the cow is able to move on all sides with equal ease.

	A) 1696 sq m
	B) 1694 sq m
	C) 1594 sq m
	D) 1756 sq.m
	E) 1896 sq.m

The average of 5 consecutive integers starting with m as the first integer is n. What is the average of 9 consecutive integers that start with m+2?

	A) m + 4
	B) n + 6
	C) n + 3
	D) m + 5
	E) n + 4


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