Solution:

In the first deal, Sam made a profit of $250.
In the second deal, Sam made a profit of $250 again.

Therefore, he earned a total profit of $500.

Solution:

One Night Stand.

Explanation:
Number 'One' + Knight(chess piece) + st + and(symbol &)

Solution:

Adam and Eve were the only people without navel. As they were not born out of a mother, they never had umbilical cords and thus never had navels.

Solution:

The brain teaser can be solved as shown in the image below.

Solution:

I will be thrown at lions. Now if Akbar threw him at lions, Birbal’s statement will stand true and he will have to bury him alive. But if he bury him, the statement will emerge as false. Thus he had no choice left

Solution:

Everyone will done one day or other.

Abraham Lincoln era is too old and we expect most of them(if not all) to be dead by now.

Solution:

5 leopard and one sheep

since all animal are rational , once 1st leopard eats the sheep all the rest of leopard would know about this.

Solution:

A Spider

Solution:

2 degree below zero

Solution:

888 + 88 + 8 + 8 + 8 = 1000

Solution:

Can be found on the pic below.