Who is that with a neck and no head, two arms and no hands? What is it?

Can you solve the below tricky visual equation?

Can you make four (4) nines (9) equal 100?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

The dirtier I get, the whiter I look. Who am I?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

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?

O_er_t_o_

Complete the missing letters of the given word.

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.