Category: Logical Reasoning

No.	Topics.	No.	Topics.
1.	CAUSE AND EFFECT	2.	COURSE OF ACTION
3.	CRITICAL THINKING	4.	LETTER AND SYMBOLS SERIES
5.	LOGICAL DEDUCTIONS	6.	LOGICAL PROBLEMS

Question: Which is heavier: a kilogram of feathers or a kilogram of iron?

The iron
The feathers
They both weigh the same.
It depends on the volume.

Question: There are 8 apples in a basket. You take away 3. How many apples do you have?

8
5
3
11

Question: What has cities, but no houses; forests, but no trees; and water, but no fish?

A dream
A book
A map
A photograph

Question: A boy is looking at a portrait. Someone asks him whose portrait it is. He replies, “Brothers and sisters I have none, but that man’s father is my father’s son.” Whose portrait is it?

His own
His father's
His son's
His grandfather's

Question: You have two ropes that each take exactly one hour to burn from one end to the other. They do not burn at a uniform rate. How can you measure exactly 45 minutes?

Light one rope at both ends (30 mins). At the same time, light the other rope at one end. When the first rope burns out, light the other end of the second rope (15 mins).
It is not possible.
Burn one rope and then half of the second rope.
Cut one rope into a 3/4 length and burn it.

Question: A drawer contains 10 red socks and 10 blue socks. It is completely dark. What is the minimum number of socks you must take out to be sure you have a matching pair?

2
3
11
20

Question: A doctor gives you three pills and tells you to take one every half hour. How long will the pills last?

1.5 hours
1 hour
30 minutes
2 hours

Question: There are two doors, one leads to freedom and the other to danger. In front of the doors are two guards, one who always lies and one who always tells the truth. You can ask one question to one guard. What question do you ask?

"Which door would the other guard say leads to freedom?" (Then choose the opposite door).
"Which door leads to freedom?"
"Do you always tell the truth?"
"Are you the lying guard?"

Question: A man has to take a wolf, a goat, and a cabbage across a river in a boat that can only carry him and one other item. If left alone, the wolf will eat the goat, and the goat will eat the cabbage. How does he do it?

Take the goat across first, return. Take the wolf across, bring the goat back. Take the cabbage across. Return and take the goat across.
It is impossible.
Take the wolf across first.
Take the cabbage across first.

Question: Two people are standing back to back. How can they see each other without turning around or using mirrors?

They can't.
They can turn their heads.
One person can walk around the other.
They can both walk forward a few steps and then turn to face each other.

Question: You have a 3-liter jug and a 5-liter jug. How can you measure out exactly 4 liters of water?

Fill the 5L jug, pour into 3L jug (2L left). Empty 3L jug. Pour the 2L from 5L jug into 3L jug. Fill 5L jug and pour into 3L jug until it's full (1L goes in). 4L is left in the 5L jug.
It is impossible.
Fill the 3L jug and pour it into the 5L jug twice.
Fill the 5L jug and pour 1L out.

Question: There are three switches outside a room for three different light bulbs inside. You can only enter the room once. How can you determine which switch controls which bulb?

Flip one switch, wait, turn it off. Flip another switch on, then enter. The hot bulb is switch 1, the lit bulb is switch 2, the other is switch 3.
Flip all switches and enter.
Flip one switch and enter.
It is impossible to determine.

Question: Four boxes (1, 2, 3, 4) are in a row. A red box is next to a blue box. A green box is not next to the blue box. The fourth box is yellow. Which box must be the green one?

Box 1
Box 2
Box 3
Cannot be determined

Question: A building has 5 floors. Mr. A lives above Mr. C. Mr. B lives below Mr. D. Mr. A lives on the 3rd floor. Mr. C lives on the floor directly below Mr. A. Who lives on the 1st floor?

Mr. A
Mr. B
Mr. C
Mr. D

Question: A is the mother of B. B is the father of C. What is the relationship of A to C?

Mother
Aunt
Grandmother
Sister

Question: All noble gases are stable. Helium is a noble gas. Therefore:

Helium is unstable.
Helium is stable.
All stable elements are noble gases.
Helium is not a gas.

Question: If you don’t water the plant, it will die. The plant is dead. Conclusion:

You definitely did not water it.
You watered it too much.
It could be that you didn't water it, or it died for another reason.
The plant was fake.

Question: All liquids take the shape of their container. Water is a liquid. Therefore:

Water has a fixed shape.
Water takes the shape of its container.
All things that take the shape of their container are water.
Water is not a liquid.

Question: X is a positive number. Y is a negative number. What is X multiplied by Y?

Always positive
Always negative
Can be positive or negative
Always zero

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