I’m tall when I’m young, and I’m short when I’m old. What am I?

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

What do you get if you add 2 to 100 four times?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

what does the below rebus means?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

The answer I give is yes, but what I mean is no. What was the question?

If two fifty-foot ropes are suspended from a forty-foot ceiling that is twenty feet apart, how much rope will you be able to steal if you have a knife?

Your job is to measure 45 minutes if you have only two cords and matches to light the cords.

1. The two cords are twisted from various materials, so their different segments can burn at different rates.
2. Each cord burns from end to end in exactly one hour.

Describe your way of measuring the 45 minutes.

Solve the following series:
AZ, GT, MN, __, YB