199+ Verbal Reasoning - Logical Deduction Questions and Answers With Explanation

Q:

Read the following question and decide which of the given statements is/are sufficient.

.
In a class of 50 students, how many girls scored above 80% in Maths?

Statements:

1. Exactly four boys scored above 80% in Maths.

2. One-third of the class scored above 80% in Maths

A) Either 1 or 2 is sufficient to answer the question.	B) Both 1 or 2 together are sufficient to answer the question.
C) 1 alone is sufficient while 2 alone is not sufficient to answer the question.	D) .2 alone is sufficient while 1 alone is not sufficient to answer the question.

Answer & Explanation Answer: A) Either 1 or 2 is sufficient to answer the question.

Explanation:

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Q:

Statements :
All keys are locks.
All locks are bangles.
All bangles are cars.

Conclusion :
a. Some cars are locks.
b. Some bangles are keys.
c. Some cars are keys.

A) Only a follows	B) Only c follows
C) Only a & b follows	D) a, b & c follows

Answer & Explanation Answer: D) a, b & c follows

Explanation:

All locks are bangles + All bangles are cars = A + A = A
= All locks are cars => Some cars are locks.
Hence conclusion (a) follows.
All keys are locks + All locks are bangles = A + A = A
= All keys are bangles => some bangles are keys.
Hence conclusion (b) follows.
All keys are bangles + All bangles are cars = A + A = A
= All keys are cars => Some cars are keys.
Hence conclusion (C) follows.

Thus all a, b and c follows.

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4 37713

Q:

Fact 1: All hats have brims.
Fact 2: There are black hats and blue hats.
Fact 3: Baseball caps are hats.

If the first three statements are facts, which of the following statements must also be a fact?
I. All caps have brims.
II. Some baseball caps are blue.
III. Baseball caps have no brims.

A) I only	B) II only
C) I, II, and III	D) None of the statements is a fact.

Answer & Explanation Answer: D) None of the statements is a fact.

Explanation:

All baseball caps have brims, since baseball caps are hats (Fact 3) and all hats have brims (Fact 1). This rules out statement III—but it doesn’t follow that all caps, a category that may include caps that are not baseball caps, have brims (statement I). Statement II cannot be confirmed, either, since it is possible, given the information, that all baseball caps are black.

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4 37300

Q:

Statement :

The byproducts obtained from animals such as hairs, skins, horns, etc. contain at least 45 per cent food protein. Indian scientists have developed methods to segregate 50 per cent of this protein. They have used an enzyme developed in Russia for destruction of soya-proteins.

Conclusions:

A. Indian scientists cannot develop enzymes.

B. If a suitable method involving less cost is developed then many more food protein would be obtained.

A) Only A follows	B) Only B follows
C) Neither A nor B follows	D) Both A & B follows

Answer & Explanation Answer: C) Neither A nor B follows

Explanation:

There is no indication that Indian scientists are incapable of developing enzymes. There could be any number of reasons why Indian scientists used Russian enzymes.

So conclusion A does not follow.

In addition, cost is not discussed in the passage at all. There is no mention of a correlation between cost and extraction of proteins.

Thus, conclusion B does not follow either.

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4 35659

Q:

I. Tanya is older than Eric.

II. Cliff is older than Tanya.

III.Eric is older than Cliff.

If the first two statements are true, the third statement is

A) true	B) false
C) uncertain	D) none

Answer & Explanation Answer: B) false

Explanation:

Because the first two statements are true, Eric is the youngest of the three, so the third statement must be false

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59 28756

Q:

I. During the past year, Josh saw more movies than Stephen.

II. Stephen saw fewer movies than Darren.

III.Darren saw more movies than Josh.

If the first two statements are true, the third statement is

A) true	B) false
C) uncertain	D) none

Answer & Explanation Answer: C) uncertain

Explanation:

Because the first two sentences are true, both Josh and Darren saw more movies than Stephen. However, it is uncertain as to whether Darren saw more movies than Josh.

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50 28102

Q:

Artists are generally whimsical. Some of them are frustrated. Frustrated people are prone to be drug addicts.

Based on these statements which of the following conclusions is true?

A) All frustrated people are drug addicts	B) Frustrated people are whimsical
C) All drug addicts are artists	D) Some artists may be drug addicts

Answer & Explanation Answer: D) Some artists may be drug addicts

Explanation:

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41 27923

Q:

Statements followed by some conclusions are given below.

Statements :

1. Some electricians are plumbers.

2. All plumbers are mechanics.

Conclusions :

I. Some mechanics are electricians or plumbers.

II. Not all electricians are mechanics.

Find which of the given conclusions logically follows from the given statements.

A) Only conclusion I follows	B) Only conclusion II follows
C) Both I and II follow	D) Neither I nor II follows

Verbal Reasoning - Logical Deduction Questions

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