Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?

In the image below, can you find the value of an angle(y)

Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols.

9 # 8 # 7 # 6 # 5 # 4 = 91

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.

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

Two-person want to cross a river. Only one boat is present on the riverside that can carry only one person at a time.

However, they still manage to cross the river. How is it possible?

A man plots the murder of his wife. His plan is full proof. Nobody saw them leaving their house. He stabbed her with a knife while driving. She died on the spot. He threw her body in a valley. He threw the knife carefully wiping his finger prints on a random garbage bin. Then he went back to his home and no one was watching him this time as well.

After an hour, he was called by the local police department who informed him that his wife was murdered. They asked him to reach the scene of crime immediately. But as soon as he arrived at the crime scene, he was arrested by them.

How did the police know that he himself is the murderer?

How many triangles are there on the puzzle below?