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

In the city of Brain Teasers, 5% of people do not list their phone numbers. Now if we select random 100 people from the phone directory, then how many people selected will have unlisted phone numbers?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

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

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

In the picture given below, can you find out which digit will take place of the question mark?

What am I?

Why Wine Glass Stem is so long?

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?