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# the sum 7/8 + 1/9 is between a. 1/2 & 3/4 b. 3/4 & 1

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Senior Manager
Joined: 04 Jun 2007
Posts: 364

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the sum 7/8 + 1/9 is between a. 1/2 & 3/4 b. 3/4 & 1 [#permalink]

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22 Aug 2007, 19:26
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

the sum 7/8 + 1/9 is between
a. 1/2 & 3/4
b. 3/4 & 1
c. 1 & 5/4
d. 5/4 & 3/2
e. 3/2 & 2

what's the fastest way to solve?

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Director
Joined: 03 May 2007
Posts: 867

Kudos [?]: 271 [0], given: 7

Schools: University of Chicago, Wharton School
Re: Old Real GMAT question [#permalink]

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22 Aug 2007, 19:50
r019h wrote:
the sum 7/8 + 1/9 is between
a. 1/2 & 3/4
b. 3/4 & 1
c. 1 & 5/4
d. 5/4 & 3/2
e. 3/2 & 2

what's the fastest way to solve?

B. since 7/8 is already in between 3/4 & 1 and 1/9 is < 1/8, so it is still in between 3/4 & 1.

Kudos [?]: 271 [0], given: 7

Manager
Joined: 15 Aug 2007
Posts: 69

Kudos [?]: 5 [0], given: 0

Re: Old Real GMAT question [#permalink]

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22 Aug 2007, 19:50
r019h wrote:
the sum 7/8 + 1/9 is between
a. 1/2 & 3/4
b. 3/4 & 1
c. 1 & 5/4
d. 5/4 & 3/2
e. 3/2 & 2

what's the fastest way to solve?

Fasted way -Process of elimination

1/9 < 1/8 so it should be very near to 1 but slightly less than it.

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Manager
Joined: 15 Aug 2007
Posts: 69

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22 Aug 2007, 19:51
Juss noticed we both posted at the same time..

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Manager
Joined: 18 Jun 2007
Posts: 87

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22 Aug 2007, 21:22
B.. approximate the values as close as possible..

It helps !

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Manager
Joined: 03 Sep 2006
Posts: 233

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23 Aug 2007, 01:29
Fistail's method is good, but if you want to double check:

7/8 + 1/9 = 64/72 = (8*8)/(9*8) = 8/9

C, D, E are out
3/4 = 6/8 and is lesse then 8/9 ==> Ans. B

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Manager
Joined: 22 May 2007
Posts: 121

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23 Aug 2007, 09:16
Can't we just solve it and see that it is just below 1? It takes seconds.

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Director
Joined: 31 Mar 2007
Posts: 574

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23 Aug 2007, 11:21
7/8 = 63/72
1/9 = 8/72

63+8 = 71/72

which makes is SUPER easy....... between 3/4 & 1, B

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23 Aug 2007, 11:21
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# the sum 7/8 + 1/9 is between a. 1/2 & 3/4 b. 3/4 & 1

Moderator: chetan2u

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