syllogism for ibps so/lic aao

SYLLOGISM FOR IBPS SO/LIC AAO
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Directions (Q. 1-14): In each group of questions below are two/three statements followed
by two conclusions numbered I and II. You have to take the given statements to be true
even if they seem to be at variance with commonly known facts and then decide which of
the given conclusions logically follows from the two/three statements, disregarding commonly
known facts. Give answer
1) if only conclusion I follows.
2) if only conclusion II follows.
3) if either conclusion I or conclusion II follows.
4) if neither conclusion I nor conclusion II follows.
5) if both conclusion I and conclusion II follow.
1.
Statements: All books are magazines.
No magazine is a newspaper.
Conclusions: I. No book is a newspaper.
II. Some magazines are books.
(2-3):
Statements: Some mobiles are telephones.
All telephones are pagers.
No pager is a camera.
2.
Conclusions: I. Some mobiles are definitely not cameras.
II. No mobile is a camera.
3.
Conclusions: I. All telephones are cameras.
II. All mobiles being telephones is a possibility.
(4-5):
Statements: No cube is a cuboid.
Some cuboids are rectangles.
All squares are cubes.
4.
Conclusions: I. No cuboid is a square.
II. All cubes being rectangle is a possibility.
5.
Conclusions: I. No rectangle is a square.
II. No cube is a rectangle.
6.
Statements: All fruits are vegetables.
Some vegetables are pulses.
Some pulses are not cereals.
Conclusions: I. Some vegetables are not cereals.
II. All vegetables being fruits is a possibility.
7.
Statements: All schools are colleges
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All schools are universities
No university is a campus.
Conclusions: I. All colleges are universities
II. All schools being campus is a possibility.
8.
Statements: Some exams are tests.
No exam is a question.
Conclusions: I. No question is a test.
II. Some tests are definitely not exams.
(9-10):
Statements: All forces are energies.
All energies are powers.
No power is heat.
9.
Conclusions: I. Some forces are definitely not powers.
II. No heat is force.
10. Conclusions: I. No energy is heat.
II. Some forces being heat is a possibility.
(11-12):
Statements: No note is a coin.
Some coins are metals.
All plastics are notes.
11.
Conclusions: I. No coin is plastic.
II. All plastics being metals is a possibility.
12. Conclusions: I. No metal is plastic.
Il. All notes are plastics.
13. Statements: Some symbols are figures.
All symbols are graphics.
No graphic is a picture.
Conclusions: I. Some graphics are figures.
II. No symbol is a picture.
14. Statements: All vacancies are jobs.
Some jobs are occupations.
Conclusions: I. All vacancies are occupations.
II. All occupations being vacancies is a possibility.
ANSWERS WITH EXPLANATIONS:
1. 5;
All books are magazines (A) + No magazine is a newspaper (E) = A + E = E = No book is
a newspaper. Hence, conclusion I follows.
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Again, All books are magazines
Some magazines are books, Thus conclusion
II follows.
So, both conclusion I and conclusion II follow.
2. 1;
Some mobiles are telephones (I) + All telephones are pagers (A) = I + A = I = Some mobile
are pagers (I) + No pagers is a camera (E) = I + E = O = Some mobiles are not cameras.
Hence, I follows.
3. 2;
All telephones are pagers (A) + No pager is a camera (E) = A + E = E = No telephone is a
camera. Hence conclusion I does not follow.
But, Some mobiles are telephones means, All mobiles being telephone is a possibility.
4. 5;
All squares are cubes (A) + No cube is a cuboid (E) = A + E = E = No square is a cuboid
No cuboid is a square.
Hence, conclusion I follows.
No cube is a cuboid (E) + Some cuboids are rectangles (I) = E + I = O* = Some rectangles
are not cubes. It means All cubes being rectangle is a possibility.
Both conclusion I and II follow.
5. 4;
All squares are cubes (A) + No cube is a cuboid (E) = A + E = No square is a cuboid (E) +
Some cuboids are rectangles (I) = E + I = O* = Some rectangle are not squares,
Hence, conclusion I does not follow.
Similarly conclusion II does not follow.
6. 2;
All fruits are vegetables (A)
Some vegetables are fruits.
It means, All vegetables being fruits is a possibility. Hence, conclusion II follows.
But, Some vegetables are pulses (I) + Some pulses are not cereals (O) = I + O = No
conclusion.
Hence, conclusion I does not follow.
7. 4; All schools are colleges
Some colleges are schools (I) + All schools are
universities (A) = I + A = I = Some colleges are universities. Hence, conclusion I does not
follow.
All schools are universities (A) + No university is a campus (E) = A + E = E = No school is
a campus.
Hence, conclusion II does not follow.
Thus, neither conclusion I nor II follows.
8. 4;
Some exams are tests
Some tests are exams (I) + No exam is a question (E)
= I + E = O = Some tests are not questions.
Hence, neither conclusion I nor II follows.
9. 2;
All forces are energies (A) + All energies are powers (A) = A + A = A = All forces are
powers (A) + No power is heat (E) = A + E = E No force is heat
No heat is
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force.
Hence, conclusion II follows but conclusion I does not follow.
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10. 1; All energies are powers (A) + No power is heat (E) = A + E = E = No energy is heat.
Hence, conclusion I follows.
But, All forces are power (A) + No power is heat (E) = A + E = E = No force is heat.
So, conclusion II does not follow.
11. 5; All plastics are notes (A) + No note is a coin (E) = A + E = E = No plastic is a coin
No coin is plastic.
Hence, conclusion I follows.
Again, No plastic is coin (E) + Some coins are metals (I) = E + I = O* = Some metals are
not plastics. It means All plastics being metals is a possibility.
12. 4; All plastics are notes (A)
Some notes are plastics.
Hence, conclusion II does not follow.
Again, All plastics are notes (A) + No note is a coin (E) = A + E = E = No plastic is a coin
(E) + Some coins are metals (I) = E + I = O* = Some metals are not plastics.
Hence, conclusion I does not follow.
Thus neither conclusion I nor conclusion II follows.
13. 5; Some symbols are figures
Some figures are symbols (I) + All symbols are
graphics (A) = I + A = I = Some figures are graphics
Some graphics are
figures.
Hence, conclusion I follows.
Again, All symbols are graphics (A) + No graphic is a picture (E) = A + E = E = No symbol
is a picture.
Hence, conclusion II follows.
Thus, both conclusion I and II follow.
14. 2; All vacancies are jobs (A) + Some jobs are occupations (I) = A + I = No conclusion.
Hence, I does not follow.
All vacancies are jobs
Some jobs are vacancies (I) + Some jobs are occupation
(I) = I + I = I = No conclusion
However, All occupations being vacancies is a possibility.
Thus, conclusion II follows.
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