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11 Aug 2019, 05:06
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E
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Difficulty:
75%
(hard)
Question Stats:
57% (02:18) correct
43%
(02:24)
wrong
based on 578
sessions
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In the Centerville Botanical Gardens, all tulip trees are older than any maples. A majority, but not all, of the garden's sycamores are older than any of its maples. All the garden's maples are older than any of its dogwoods.
If the statements above are true, which one of the following must also be true of trees in the Centerville Botanical Gardens?
(A) Some dogwoods are as old as the youngest tulip trees.
(B) Some dogwoods are as old as the youngest sycamores.
(C) Some sycamores are not as old as the oldest dogwoods.
(D) Some tulip trees are not as old as the oldest sycamores.
(E) Some sycamores are not as old as the youngest tulip trees.
If the statements above are true, which one of the following must also be true of trees in the Centerville Botanical Gardens?
(A) Some dogwoods are as old as the youngest tulip trees.
(B) Some dogwoods are as old as the youngest sycamores.
(C) Some sycamores are not as old as the oldest dogwoods.
(D) Some tulip trees are not as old as the oldest sycamores.
(E) Some sycamores are not as old as the youngest tulip trees.
13 Aug 2019, 03:29
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Quote:
The right answer here is E. Inference questions can sometimes be tricky since you have to pick an answer that is true 100% rather than something that is just 'mostly true'. However, the best way to do this is to instead eliminate answers that have even the slightest potential to be false. This means that you're eliminating based on "can be false". When you have 'some/sometimes' statements, the best way to do this is to put a 'not' before the some/sometimes and see if its possible that it can be true.
We know: All tulips older than maples, All maples older than dogwoods, most Sycamores older than Maples but we don't know about the oldest Sycamores in relationship to tulips, or the youngest in relationship to dogwoods.
A - Dogwoods are all younger than any of the tulips, so this is definitely false. OUT
B - Anything is possible with the Sycamores, and some dogwoods could be as old as the youngest ones. But, it's also just as likely that they may not be, so this can be false. OUT
C - Again, anything is possibly with the sycamores. It could be that some of them are younger than the oldest dogwoods, but it could just as easily be not. OUT
D - Once again, it is possible that the all the tulips are older than the oldest Sycamores, so we must eliminate because it can be false. OUT
E - It's simply not possibly that no sycamores are younger than the youngest tulips, since we know that some of them are younger than maples, and ALL maples are younger than the youngest tulip. Hence, this answer MUST be true.
- Matoo
13 Aug 2019, 03:56
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In the Centerville Botanical Gardens, all tulip trees are older than any maples. A majority, but not all, of the garden’s sycamores are older than any of its maples. All the garden’s maples are older than any of its dogwoods.
If the statements above are true, which one of the following must also be true of trees in the Centerville Botanical Gardens?
(A) Some dogwoods are as old as the youngest tulip trees.
Out as Maples are older than dogwoods.
(B) Some dogwoods are as old as the youngest sycamores.
Out as sycamores are older than Maples.
(C) Some sycamores are not as old as the oldest dogwoods.
Out as sycamores are older than Maples.
(D) Some tulip trees are not as old as the oldest sycamores.
Out as no information is given.
(E) Some sycamores are not as old as the youngest tulip trees
Yes, this choice is true.
E
If the statements above are true, which one of the following must also be true of trees in the Centerville Botanical Gardens?
(A) Some dogwoods are as old as the youngest tulip trees.
Out as Maples are older than dogwoods.
(B) Some dogwoods are as old as the youngest sycamores.
Out as sycamores are older than Maples.
(C) Some sycamores are not as old as the oldest dogwoods.
Out as sycamores are older than Maples.
(D) Some tulip trees are not as old as the oldest sycamores.
Out as no information is given.
(E) Some sycamores are not as old as the youngest tulip trees
Yes, this choice is true.
E
