You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

A solo dice game is played. In this game, upon each turn, a normal pair of dice is rolled and the score is calculated not by adding the numbers but multiplying them.

In a particular game, the score for the second roll is five more than what was achieved in the first roll. The score for the third roll is six less than what was completed in the second roll. The score for the fourth roll is eleven more than what was achieved in the third. The score for the fifth roll is eight less than what was completed in the fourth.

Can you calculate the score for each of the five throws?

Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?

How many triangles are there in the picture below?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

In a university, a professor gave a set of three problems to the three brilliant students of his class. See the image for the questions.

A Monkey, a squirrel, and an Eagle are racing to the top of the mango tree. Assuming all these animals are in perfect shape, Which animal will reach to Banana first?