How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

You are in a land where thirty men and two women were dressed in classic black and white dresses.
They begin to fight as soon as any of them move.

Where are you?

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

What month of the year has 28 days?

Through your logical capabilities, can you make 7 an even?

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

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?

Before the start of the car race, John and Jacob have the same amount of fuel in their car. With this fuel, John can drive for 4 hours while Jacob can drive five hours.
After a time they realize that the amount of fuel left in John's car is 1/4th of the fuel in Jacob's.

For how long they are racing?

If 1+9+8=1, what is 2+8+9?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?