2. Problem Solving

Logical Puzzles — Quiz

Test your understanding of logical puzzles with 5 practice questions.

Practice Questions

Question 1

Three friends, A, B, and C, are discussing their ages. A says, "I am not the youngest." B says, "I am older than C." If only one of them is lying, and the other two are telling the truth, who is the youngest?

Question 2

In a town, there are two types of people: Knights, who always tell the truth, and Knaves, who always lie. You meet two people, P and Q. P says, "Both of us are Knaves." Q says, "P is a Knave." What are P and Q?

Question 3

A puzzle involves three colored boxes: red, blue, and green. Each box contains a different fruit: an apple, a banana, or a cherry. We know the following:

1. The apple is not in the red box.
2. The blue box does not contain the cherry.
3. The green box contains the banana.

Which fruit is in the red box?

Question 4

Consider a sequence of operations: first, double a number; second, add 5; third, divide by 3. If the final result is 9, what was the original number?

Question 5

Four people, J, K, L, and M, are standing in a line. We know the following:

1. J is not at either end.
2. K is immediately to the right of L.
3. M is at one of the ends.

What is the correct order of the people from left to right?