What work can one never finish?

I am a five-letter word under you,
Remove the first letter and I am above you,
Remove the second as well and I am around you.

Who am I?

You see me once in June, twice in November, and not at all in May. What am I?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

Five thieves looted a bank and they ran away in a car. The bank staff informed the police and they began the search of their car in their jeep. They found them on a road and chased them eventually catching them. The light that is used to fill the number plate was broken on the thieves' car. Also, the headlights of the jeep police were not working. How were the police able to catch the thieves then?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

You can hear me, but you can't touch or see me.

What am I?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

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?