What happened when the wheel was invented?

How many times do a clock's hands overlap in a day ?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

How can one talk without saying a single word?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

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

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

There are three identical triplets sisters. Demi is the oldest of them all and she always speaks the truth. Diana is the next one who is a liar always. Drew, the youngest of them all speaks both truth and lies randomly.

On a rainy day, a family friend Victor visited them. Since there were starkly identical, he was not able to recognize them. Thus to clarify, he asked one question to each one of them.

He started with the one standing on the left and asked, 'Which sister is in the middle of you three?' She answered, 'That's Demi.'

Then, he asked the one standing in the middle, 'What is your name?' She answered, 'I am Drew.'

Finally, he asked the one standing on the right, 'Who is standing in the middle?' She answered, 'She is Diana.'

Victor was left baffled. He asked the questions three times and received different answers every time.

Can you tell who was who?