What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

In the given picture, you can find two letters missing. When two particular letters are placed in the missing spots, you get an eight-letter word while reading in the anti-clockwise direction. Can you find out the missing letters and the missing word eventually?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

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

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?