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In the terminating decimal equivalent of d, what is the

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In the terminating decimal equivalent of d, what is the

by M7MBA » Sat Apr 07, 2018 12:45 am
In the terminating decimal equivalent of d, what is the number of nonzero digits to the right of the decimal point?

(1) d = 5 + 416/1,000
(2) The terminating decimal equivalent of d has one nonzero digit to the left of the decimal point.

The OA is the option A.

I didn't understand this question. May someone helps me? Thanks in advanced.
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by Sionainn@PrincetonReview » Sat Apr 07, 2018 9:11 am
A terminating decimal is one that ends. For example 1/2 = 0.5, which is a terminating decimal. But 1/3 = 0.333333...., which keeps on going so it's a non-terminating decimal.

With statement one, you can convert the fraction 416/1000 to the decimal 0.416 (just reading the fraction 416 thousandths can help with the conversion). So with this statement we know d = 5.416, which has 3 nonzero digits after the decimal point. Statement one is sufficient. Eliminate B, C and E.

Statement two tells us about the digits to the left of the decimal point. So the number could be 2.5 and have 1 nonzero digit to the right of the decimal but the number could also be 2.542 and have 3 nonzero digits to the right of the decimal. Statement 2 is insufficient since we don't get a consistent answer. So the answer is A.

Make senses?

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Sionainn Marcoux
BA - Stanford University, MPP - Harvard University
Instructor, tutor for Princeton Review and Airbnb host
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