Basic Numeracy/Quantitative Aptitude

486. Points X, Y, and Z lie on circle C, and line segment XY passes through the center of the circle. If the area of circle C is 18pi, what is the greatest possible perimeter of triangle XYZ?

	(a) 18
	(b) 3r2 + 18
	(c) 6r2 + 6
	(d) 6r2 + 12

487. certain store sold pens for $0.35 each and pencils for $0.25 each. If a customer purchased both pens and pencils from the store for a total of $2.50, what total number of pens and pencils did the customer purchase?

	(a) 8
	(b) 9
	(c) 10
	(d) 11

488. A zoologist recorded the number of cubs under the care of each of 12 adult female lions. What was the standard deviation of the numbers of cubs under the care of the 12 adult female lions?

(1) Each of the 12 adult female lions had either 2 or 3 cubs under her care.
(2) 8 of the 12 adult female lions had the same number of cubs under her care.

	(a) Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
	(b) Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
	(c) BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
	(d) EACH statement ALONE is sufficient.

TOTAL

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