Two Questions

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ajmoney09: Master | Next Rank: 500 Posts; Posts: 110; Joined: Sun May 25, 2008 3:45 pm

by ajmoney09 » Fri Jan 16, 2009 10:36 am

If n is an integer between 2 and 100 and if n is also the square of an integer, what is the value of n?
(1) n is the cube of an integer.
(2) n is even

OA is A

Last Tuesday a trucker paid $155.76, including 10 percent state and federal taxes, for diesel fuel. What was the price per gallon for the fuel if the taxes are excluded?
(1) The trucker paid $0.118 per gallon in state and federal taxes on the fuel last Tuesday.
(2) The trucker purchased 120 gallons of the fuel last Tuesday.

OA is D - - I said B...You need the amount of gallons to figure this one out, no?

Source: Beat The GMAT — Data Sufficiency | Fri Jan 16, 2009 10:36 am

logitech: Legendary Member; Posts: 2134; Joined: Mon Oct 20, 2008 11:26 pmFollowed by: 25 members; Thanked: 237 times; GMAT Score:730

Re: Two Questions

by logitech » Fri Jan 16, 2009 10:53 am

If n is an integer between 2 and 100 and if n is also the square of an integer, what is the value of n?

(1) n is the cube of an integer.

2 4 9 16 25 36 49 64 81 100

SUF

(2) n is even

2 4 9 16 25 36 49 64 81 100

INSUF

Last Tuesday a trucker paid $155.76, including 10 percent state and federal taxes, for diesel fuel. What was the price per gallon for the fuel if the taxes are excluded?

(1) The trucker paid $0.118 per gallon in state and federal taxes on the fuel last Tuesday.

$0.118 x 10 = $1.18 [ 10% tax + 100 % gas = 110 % ]

(2) The trucker purchased 120 gallons of the fuel last Tuesday.[/quote]

$ 155.76 x 10 / (11x 120) = $1.18

OA is D - - I said B...You need the amount of gallons to figure this one out, no?

The first one is already talking about $/gal so you dont need to worry about the GALLON

LGTCH
---------------------
"DON'T LET ANYONE STEAL YOUR DREAM!"

ajmoney09: Master | Next Rank: 500 Posts; Posts: 110; Joined: Sun May 25, 2008 3:45 pm

by ajmoney09 » Fri Jan 16, 2009 6:57 pm

Thanks Logitech.

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