StartupAddict wrote:
Here's the thing that ticks me off. LOGICALLY, we can assume they're all alive initially (otherwise how would Tina have a freaking name?). So in 4 years Tina would be at least 4, hence III should *logically* be true.
But, alas, the DS nazi who writes the DS questions says nope, you can't assume that.... so basically Tina isn't born yet.
So III need not be true.
So just remember, when doing age questions, don't assume the person is already born
You're a tutor? How much are you charging? You meeting up at his/your house or at school? You doing this by yourself or through some kind of organization? Would be a good way for me to make some money.
As for the question itself.
I is obviously false.
II is oviously true.
And we need to have a closer look at III
R = Rose
S = Sam
T = Tina
Today Rose is twice as old as Sam and Sam is 3 years
younger than Tina. If Rose, Sam, and Tian are all alive 4 years from
Today, which of the following must be true on that day?
Formulas:
R = 2S
S = T-3
Then to see whether it has to be true, you can just plug in the lowest number you can think of that work.
R:2
S:1
T:4
4 years later:
R:6
S:5
T:8
Hence, Tina CAN be older then Rose.
I - Rose is twice as old as Sam
II - Sam is 3 years younger than Tina
III - Rose is older than Tina
A) I only
B) II onlyC) III only
D) I and II
E) II and III
Glad to have been of help.
For the record... I'm taking the GMAT on tuesday. Been studying 2-3 hours a day for a month. Did 4 prep. tests so far:
49Q, 46V, 770
49Q, 50V, 770
50Q, 44V, 770
49Q, 44V, 760
Would be really really happy with a 770.
EDIT: I'm an idiot. After proving that 3 was not necessarily true, I chose it in my answer. Whoops...