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

A man lives on the fifteenth floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator, and, if there is someone else in the elevator, or if it was raining that day, he goes back to his floor directly. Otherwise, he goes to the tenth floor and walks up five flights of stairs to his apartment. Can you explain why he does this?

If we change the South-East direction into North and North-East into West and all others similarly.
Can you find out which direction will be in the place of South-West direction?

The Little ant seems to be always confused. Do you know why?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

What does does this rebus picture means ?

Below, you can see some coding:
January = 1017
February = 628
March = 1335
April = 145
May = 1353
June = 1064
July = 1074
August = 186

Now deciphering the way it has been coded, can you find out how September will be coded?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

What does below pictogram mean?