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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.

If the price of gasoline increases by 25% and Ron intends to spend only 15% more on gasoline, by what % should he reduce the quantity of petrol that he buys?

	A) 10%
	B) 12.5%
	C) 8%
	D) 12%
	E) 6.66%

Data Sufficiency : A set S contains the following elements: {7, 11, 15, 19, 23, x}. What is the value of x? All numbers used are real numbers.

(1) The elements are in arithmetic progression
(2) x is prime

This data sufficiency problem consists of a question and two statements, labeled (1) and (2), in which certain data are given. You have to decide whether the data given in the statements are sufficient for answering the question. Using the data given in the statements, plus your knowledge of mathematics and everyday facts (such as the number of days in a leap year or the meaning of the word counterclockwise), you must indicate whether -

	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.

How many 3 digit positive integers exist that when divided by 7 leave a remainder of 5?

	A) 128
	B) 142
	C) 143
	D) 141
	E) 129

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


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