What does below chemistry rebus means?

Why do people go to bed?

what does the below rebus mean?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

Can you divide the below-given shape into four equal and identical pieces?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

Solve this tricky question. You are trapped in a forest. With you, you have a gun preloaded with two bullets in it. In front of you, there is a tiger, a leopard and a jaguar.

How do you survive?

In an Art Gallary, When the clock hit 11 am, Artist hung the painting number 30. When it struck 4 pm, he hung painting number 240 and when it struck 7:30 pm, he hung painting number 315.

Can you determine, which painting number will he hang when the time is 9:20 pm?

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.

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?