using four eights (8) and a one (1) and one mathematical symbol , create the number 100

People are waiting in line to board a 100-seat aeroplane. Steve is the first person in the line. He gets on the plane but suddenly can't remember what his seat number is, so he picks a seat at random. After that, each person who gets on the plane sits in their assigned seat if it's available, otherwise, they will choose an open seat at random to sit in. The flight is full and you are last in line. What is the probability that you get to sit in your assigned seat?

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

Find the value of "?" in the ball picture Riddle below:

Every words stands for unique digit that makes the arithmetic equation true

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

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

When we see 2 but call 10?

what does the below rebus mean?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1