Replace the question mark with the correct number in the below-given picture?

Count the number of triangles in the picture below:

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

I have 50 feet long of cloth, I need to create 50 handkerchiefs each size of 1 foot. I take one minute to cut a 1-foot handkerchief. So how long will it take to cut 50 handkerchiefs?

What is the last thing you take off before bed?

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

Why is Saturday stronger than Monday?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

There were five men at church, and it started raining while they were outside. The four that ran still got wet, but the one that was still stayed completely dry. Why did he stay dry?