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Reasoning Ability

Critical thinking and logical reasoning questions

248 Q 8 Topics Take Mock Test
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Difficulty: All Easy Medium Hard 151–160 of 248
Topics in Reasoning Ability
Q.151 Medium Syllogism
No student is lazy. All lazy people are unsuccessful. What can be concluded?
A No student is unsuccessful
B All students are successful
C Some students are unsuccessful
D The conclusion cannot be determined
Correct Answer:  D. The conclusion cannot be determined
EXPLANATION

While no student is lazy, and lazy people are unsuccessful, this doesn't tell us about unsuccessful students who might be lazy or for other reasons.

Test
Q.152 Medium Syllogism
All leaders are decision makers. Some decision makers are not politicians. Which conclusion is valid?
A Some leaders are not politicians
B All leaders are politicians
C Some politicians are decision makers
D All decision makers are leaders
Correct Answer:  A. Some leaders are not politicians
EXPLANATION

Since some decision makers are not politicians, and all leaders are decision makers, some leaders must not be politicians.

Test
Q.153 Medium Syllogism
No criminal is honest. Some dishonest people are criminals. What follows?
A All dishonest people are criminals
B Some dishonest people are not criminals
C All criminals are dishonest
D No dishonest person is honest
Correct Answer:  C. All criminals are dishonest
EXPLANATION

Since no criminal is honest, it means all criminals must be dishonest (contrapositive of the first statement).

Test
Q.154 Medium Syllogism
All gold is precious. Some precious things are expensive. Can we say 'Some gold is expensive'?
A Yes, definitely
B No, it's uncertain
C No, it's impossible
D Only some gold is precious
Correct Answer:  B. No, it's uncertain
EXPLANATION

Although all gold is precious, only some precious things are expensive, so we cannot definitively conclude gold is expensive.

Test
Q.155 Medium Syllogism
Some singers are dancers. Some dancers are actors. Which conclusion is definitely correct?
A Some singers are actors
B All singers are actors
C Some singers may or may not be actors
D No singer is an actor
Correct Answer:  C. Some singers may or may not be actors
EXPLANATION

From two 'some' statements, we cannot draw a definite conclusion about the relationship between singers and actors.

Test
Q.156 Medium Syllogism
All trees are plants. No animal is a plant. Which of the following is true?
A All animals are trees
B No animal is a tree
C Some animals are trees
D All trees are animals
Correct Answer:  B. No animal is a tree
EXPLANATION

Since all trees are plants and no animal is a plant, logically no animal can be a tree.

Test
In a row of 20 students, Raj is 9th from the left. Priya is 5 positions to the right of Raj. What is Priya's position from the right?
A 5th
B 6th
C 7th
D 8th
Correct Answer:  C. 7th
EXPLANATION

Raj is 9th from left. Priya is 5 positions right of Raj, so Priya is 9+5=14th from left. From right: 20-14+1=7th from right.

Test
Find the odd one out: ROSE, LILY, SUNFLOWER, CACTUS, DAISY
A CACTUS
B SUNFLOWER
C ROSE
D LILY
Correct Answer:  A. CACTUS
EXPLANATION

Rose, Lily, Sunflower, and Daisy are all flowering plants that grow in normal soil. Cactus is a succulent plant that grows in arid/desert conditions.

Test
Some cats are dogs. All dogs are animals. Conclusion: Some cats are animals. This conclusion is:
A True
B False
C Uncertain
D Contradictory
Correct Answer:  A. True
EXPLANATION

Some cats are dogs. All dogs are animals. Therefore, those cats that are dogs must also be animals. The conclusion logically follows.

Test
If FRANCE is coded as 6-18-1-14-3-5, then SPAIN is coded as:
A 19-16-1-9-14
B 19-16-1-9-13
C 20-16-1-9-14
D 19-15-1-9-14
Correct Answer:  A. 19-16-1-9-14
EXPLANATION

F=6, R=18, A=1, N=14, C=3, E=5 (alphabetical positions). For SPAIN: S=19, P=16, A=1, I=9, N=14.

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