What's the only room from which no one can enter or leave

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

In a boat, the father of a sailor's son is sitting with the son of the sailor. However, the sailor is not present on the boat.

Can this even be possible?

How many times can you subtract the number two from the number fifty?

Five lovely ladies(Sophia, Isabella, Madison, Emma and Olivia) planned a picnic.

They each buy one thing each for the picnic.

Sophia, Emma and Olivia got a drink : orange-Juice, apple-juice, and mango-juice.
Olivia got the drink with the same letter as the one in her first name.
Emma loves mango-juice.
The other two bring some food : chocolates and pizza.
Also Madison is allergic to cheese.

So which ladies bought what ?

An ape is trying to climb on a pole that is 60 feet high. Due to the slippery surface, the ape climbs 3 feet in a minute only to slip back 2 feet.

How much time do you think the monkey will take to reach the top of the pole?

Before reading ahead, you must know the fact that only one of the people here is telling the truth.

A says that B is lying.
B says that C is lying.
C says both A and B are lying.

Can you find out who is speaking the truth?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?