What do you answer even though it never asks you questions?

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?

What has a bottom at the top?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

The first person saw the bridge step on it and crossed,
the second person saw the bridge did not step on it but crossed,
the third person did not see the bridge did not step on it but crossed.
Who are these people?

Spot the cat in the picture below

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

Can you divide numbers from 1 to 9 (1 2 3 4 5 6 7 8 9) into two groups so that the sum of the numbers of each group is equal?

Note: 9 cannot be turned over to make it 6.

Identify the 10 differences between the two given pictures.