Can you convert the number zero(0) into a positive number using just one mathematical operator ?

The following "Brain Bat" means Slow Down.
S
L
O
W

Using the same logic, can you tell us what does the following Brain Bat means ?
E
V
I
G

What 5-letter word typed in all capital letters can be read the same upside down?

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?

In a basket of apples,
when counted in twos, there was one extra
when counted in threes, there were two extra when counted in fours, there were three extra
when counted in fives, there were four extra
when counted in sixes, there was five extra.

However, if the apples were counted in sevens, no extra apple was left. Can you calculate the minimum number of apples that were present in the basket?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

I always drive my customer away.

Who am I?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

Complete the table series riddle by finding the number that can replace "??".

Which number comes next in the number series?

2, 9, 30, 93, ?