Logical Deduction Online Quiz

Answer : D

Explanation

We cannot say that some boats are oceans and also all waters cannot be boats, hence, neither of the options is valid. Hence, option D is correct.

The following question, two or three statements are given and after that two conclusions are provided. You have to take the statements to be true though it shows difference from the known facts. At first, read the statements and then go to the conclusions. Among the conclusions, decide which is logically correct and answer the question by choosing the options provided.

Q 2 - Statements: Some sticks are drums. Some drums are heavy.

Conclusions:

I. All heavy are either drums or sticks.

II. Some heavy are drums.

Options:

Answer : B

Explanation

Option I is not correct because both the statements are particular, so no definite conclusion can be ascertained but II conclusion is the opposite of the second statement and thus it holds true.

The following question, two or three statements are given and after that two conclusions are provided. You have to take the statements to be true though it shows difference from the known facts. At first, read the statements and then go to the conclusions. Among the conclusions, decide which is logically correct and answer the question by choosing the options provided.

Q 3 - Statements: Some cold drinks are toxic. Some toxic are hazardous.

Conclusions:

I. All cold drinks are hazardous.

II. No cold drinks are hazardous.

Options:

Answer : C

Explanation

We are not sure whether all cold drinks are hazardous is true or no cold drinks are hazardous is true but the chances of occurrence of both the options is equally likely hence, option C is correct.

The following question, two or three statements are given and after that two conclusions are provided. You have to take the statements to be true though it shows difference from the known facts. At first, read the statements and then go to the conclusions. Among the conclusions, decide which is logically correct and answer the question by choosing the options provided.

Q 4 - Statements: Most teachers are boys. Some boys are principals.

Conclusions:

I. Some principals are boys.

II. Some teachers are principals.

Options:

Answer : A

Explanation

Since both the statements are particular, no definite conclusion is valid. However, conclusion I is the opposite of the second statement and thus it holds true.

The following question, two or three statements are given and after that two conclusions are provided. You have to take the statements to be true though it shows difference from the known facts. At first, read the statements and then go to the conclusions. Among the conclusions, decide which is logically correct and answer the question by choosing the options provided.

Q 5 - Statements: All cars are cows. All fans are cows.

Conclusions:

I. All cars are fans.

II. Some fans are cars.

Options:

Answer : D

Explanation

Since the intermediate term 'cars' is not distributed even once in the statements, no definite conclusion is valid.

The following question, two or three statements are given and after that two conclusions are provided. You have to take the statements to be true though it shows difference from the known facts. At first, read the statements and then go to the conclusions. Among the conclusions, decide which is logically correct and answer the question by choosing the options provided.

Q 6 - Statements: All women are mothers. All mothers are sisters.

Conclusions:

I. All women are sisters.

II. Some women are not sisters.

Options:

Answer : A

Explanation

As all women are mothers and all mothers are sisters then we can directly infer that all women are sisters. Hence, conclusion I is correct. But conclusion II is not correct. Hence, option A is the answer.

The following question, two or three statements are given and after that two conclusions are provided. You have to take the statements to be true though it shows difference from the known facts. At first, read the statements and then go to the conclusions. Among the conclusions, decide which is logically correct and answer the question by choosing the options provided.

Q 7 - Statements: All bakes are cakes. All lamps are cakes.

Conclusions:

I. Some lamps are bakes.

II. No lamp is bakes.

Options:

Answer : C

Explanation

Either I or II is correct. Hence, option C is chosen.

The following question, two or three statements are given and after that two conclusions are provided. You have to take the statements to be true though it shows difference from the known facts. At first, read the statements and then go to the conclusions. Among the conclusions, decide which is logically correct and answer the question by choosing the options provided.

Q 8 - Statements: All lizards are mangoes. Some mangoes are streets. All streets are mountains.

Conclusions:

I. Some mountains are mangoes.

II. Some mountains are lizards.

Options:

Answer : A

Explanation

Some mountains are mangoes is the only possible answer. But some mountains are lizards is not correct. Hence, option A is correct.

The following question, two or three statements are given and after that two conclusions are provided. You have to take the statements to be true though it shows difference from the known facts. At first, read the statements and then go to the conclusions. Among the conclusions, decide which is logically correct and answer the question by choosing the options provided.

Q 9 - Statements: All bags are tables. All lamps are tables.

Conclusions:

I. Some lamps are bags.

II. No lamp is bag.

Options: