I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

If eleven plus two equals one, what does nine plus five equal?

In a family supper, a grandfather, a grandmother, two fathers, two mothers, four children, three grandchildren, one brother, two sisters, two sons, two daughters, one daughter-in-law, and one mother-in-law need to sit at a table.

There are only seven chairs available at the place. How many more chairs do they have to borrow so that everyone can sit down together for the suppers if everybody requires a separate chair?

Find the number of squares in the below picture

What is always in front of you but can’t be seen?

In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

I’m tall when I’m young, and I’m short when I’m old. What am I?

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?