What is the word or phrase?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

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

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

By using 'because' continuously three times, can you make an English statement ?

If an electric train is travelling south, then which way is the smoke going?

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

You along with your friend are standing in front of two houses. Each of those houses inhabits a family with two children.

Your friend tells you the below two facts:
1) On your left is a family that has a boy who likes accounts but the other child loves science.
2) On the right is a family with a seven-year-old boy and a newborn baby.

You ask him, "Does either of the family have a girl?"

To this, he replies, "I am not quite sure. But can you guess that? If you are right, I will give you $500."

Which family do you think is likely to have a girl?