A plane crashed between the border of Mexico and America. Where do you bury the survivors?

What does below chemistry rebus means?

I have branches, but no fruit, trunk or leaves. What am I?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

Spot 5 differences in two Christmas tree below:

Outside a massage parlour, there is a board that reads
"I only massage those who do not massage themselves."

Reading the above statement, does the masseur massage himself?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

Take away the whole and some still remain. What is it?