What happened when the wheel was invented?

who is silent in the parliament?

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

what does the below math rebus puzzle mean?

What has lots of eyes, but can’t see?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

What is wrong in the below Picture?

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?