One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

In a town, there are four houses located at different distances from each other. Following are the distances:

The third house is 60 meters apart from the first house.
The fourth house is 40 meters apart from the second house.
The third house is 10 meters nearer to the fourth house than it is to the second house.

Can you find out the distance between the fourth and the first house?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

A bomb exploded in a room full of married couples and no one died. How?

how come the second man dies?

The following four words might seem abrupt to you. But you can make them meaningful by just adding vowels.
RDSH
GGPLNT
TMT
NN

Hint: All of them are vegetables.

Count the number of lines in the image below ?

A detective visits his friend John just to discover that John's neighbour Dr Jacob was murdered. Dr Jacob, who is a mathematician wrote the murderer's name in a code word "Hcqtfz". There were five suspects
1. Ajit
2. Pankaj
3. Ganpat
4. Deenu
5. Hariya

The Detective was instantly able to find the murderer.
Can you?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?