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manikdhingra · 07-23-2008, 01:18 PM

Which of the following fractions has a decimal equivalent that is a terminating decimal?
A.10\189 B.15\196 C. 16\225 D. 25\144 E. 39\128

i guess there might b some rule in determining which one results in terminating,rather than finding the answer by dividing....

Test Taker · 07-23-2008, 02:23 PM

The rule is that any number divided by a power of 2 or 5 is a terminating decimal.

E qualifies for that.

Anson800 · 07-24-2008, 06:28 AM

Imo E

mwa · 07-24-2008, 08:10 PM

Testtaker,

Where did you find that rule? Is there anywhere I can read it and learn the proof behind it?

Thanks.

07-23-2008, 01:18 PM	#1 (permalink)
manikdhingra Within my grasp! Join Date: Jun 2008 Posts: 355	terminating Which of the following fractions has a decimal equivalent that is a terminating decimal? A.10\189 B.15\196 C. 16\225 D. 25\144 E. 39\128 i guess there might b some rule in determining which one results in terminating,rather than finding the answer by dividing....

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07-23-2008, 02:23 PM	#2 (permalink)
Test Taker TestMagic Guru-in-Training Join Date: Jun 2005 Posts: 608	The rule is that any number divided by a power of 2 or 5 is a terminating decimal. E qualifies for that.

07-24-2008, 06:28 AM	#3 (permalink)
Anson800 WIll do it Join Date: May 2008 Location: Singapore Posts: 124	Imo E

07-24-2008, 08:10 PM	#4 (permalink)
mwa Trying to make mom and pop proud Join Date: Jul 2008 Posts: 8	Testtaker, Where did you find that rule? Is there anywhere I can read it and learn the proof behind it? Thanks.

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