NTA Logical Reasoning 3

Question 1

Which of the following is an example of deductive reasoning?

Accepted Answer

All mammals breathe air; dolphins are mammals; therefore dolphins breathe air.

Answer

Deductive reasoning draws a certain conclusion from general premises, as in the classic syllogism about mammals and dolphins.

Question 2

If some doctors are singers and all singers are tall, which conclusion is definitely true?

Accepted Answer

Some doctors are tall

Answer

Since some doctors are singers and all singers are tall, those doctor-singers must be tall — so some doctors are tall.

Question 3

What is the next letter in the series: A, C, F, J, O, ?

Accepted Answer

U

Answer

The gaps increase by 1 each time: +2, +3, +4, +5, +6, so O + 6 = U.

Question 4

A is the brother of B. B is the sister of C. C is the son of D. How is A related to D?

Accepted Answer

Son

Answer

C is D's son; B is C's sister and D's child; A is B's brother and also D's child — so A is D's son.

Question 5

In a coded language, 123 means 'bright warm day', 345 means 'warm wet night', and 156 means 'bright cold night'. What code stands for 'night'?

Accepted Answer

5

Answer

Comparing 345 and 156, both contain 'night' and both share the code 5, so 5 = night.

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