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Re: Fun with Fractions [#permalink]
06 Aug 2009, 01:19

yezz wrote:

robertrdzak wrote:

In the fraction x/y, where x and y are positive integers, what is the value of y?

(1) the least common denominator of x/y and 1/3 is 6

(2) x = 1

from 1

y could be 2 or 6.......insuff

from 2

insuff

both 1/6 or 1/2........insuff.E

Sorry if my question sounds silly, but how do you calculate LCM for fractions? when i tried to instert 1/2 or 1/6 and 1/3 to an LCM calculator i did not get the result of 6.

Re: Fun with Fractions [#permalink]
06 Aug 2009, 02:11

tomirisk wrote:

yezz wrote:

robertrdzak wrote:

In the fraction x/y, where x and y are positive integers, what is the value of y?

(1) the least common denominator of x/y and 1/3 is 6

(2) x = 1

from 1

y could be 2 or 6.......insuff

from 2

insuff

both 1/6 or 1/2........insuff.E

Sorry if my question sounds silly, but how do you calculate LCM for fractions? when i tried to instert 1/2 or 1/6 and 1/3 to an LCM calculator i did not get the result of 6.

L.C.M. of fraction = L.CM of numerator/H.C.F of denominator ......Also note that L.CM * H.C.F =PRODUCT OF NUMBERS...

but in thsi question it was asked only least common denominator and not of whole fraction....2 & 3 L.C.M is 6 ...also 3 & 6 L.C.M is 6....

Re: Fun with Fractions [#permalink]
06 Aug 2009, 02:23

tomirisk wrote:

yezz wrote:

robertrdzak wrote:

In the fraction x/y, where x and y are positive integers, what is the value of y?

(1) the least common denominator of x/y and 1/3 is 6

(2) x = 1

from 1

y could be 2 or 6.......insuff

from 2

insuff

both 1/6 or 1/2........insuff.E

Sorry if my question sounds silly, but how do you calculate LCM for fractions? when i tried to instert 1/2 or 1/6 and 1/3 to an LCM calculator i did not get the result of 6.

Also, L.C.M of 1/2 & 1/3 will be 1....As H.C.F of 2 & 3 ..is 1

gmatclubot

Re: Fun with Fractions
[#permalink]
06 Aug 2009, 02:23

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