Infosys Aptitude questions

In each questions below are given two statements followed by two conclusionsnumbered I and II. You have to take the given two statements to be true even if they seem to be at variance from commonly known facts. read the conclusion and then decide which of the given conclusions logically follows from the two given statements, disregarding commonly known facts.
5. Statements : All bags are chalks. All chalks are bottles.
Conclusions :
I Some bottles are bags.
II. All bags are bottles
III. All bottles are bags
IV. Some chalks are not bags
A) Only I , II and IV follow
B) Only I , III and IV follow.
C) Only II, III and IV follow.
D) All Follow
E) none of these
Ans: A
6. Statements : Some trees are buses, All buses are hats
Conclusions :
I Some trees are hats
II. Some hats are trees
III. All hats are buses
IV. Some buses are hats
A) None follow s
B) Only I, II and IV follow.
C) Only II , III and IV follow.
D) All Follow
E) none of these

Vignesh_ece1790
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Jun 1st, 2011
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Questions by Vignesh_ece1790 answers by Vignesh_ece1790

Aptitude

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Amit Singh

Sep 2nd, 2011

ques 5: answer is E..as conclusion I and II follow but no other satisfies the condition

Ques 6: answer is B..conclusion I , II and IV are true if statements are assumed true...

This could be easily cleared by Venn diagram...
If : All X are Y then it follows that Some X will definitely be Y as all are Y..but we cant say the same about Y because there may or may not be some Y who are not X...but certainly Some Y are X.but we cant predict anything about remaining Y because they may be a part of X or may not be a part of X.