You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

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

A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train.

How did it happen?

When it is alive we sing, when it is dead we clap our hands. What is it?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

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

Optical Illusion Eye Test: You Have A Brain Like Computers If You Can Spot Two B's Among R's In 8 Seconds!

I can write cow in 13 letters.

Can You?

Solve the equation in the image by looking at the pattern closely.