Solution:

That person in the picture is the son of the man holding the picture.

Solution:

It is perfectly feasible. The forty elephants had forty foreheads.

Solution:

The worth of that coin is zero. This is because the B.C. and A.D. dating system was not empowered till the year 525. So the coin is probably fake.

Solution:

He is a barber.

Solution:

It is a tricky question. But it is not a question at all. It is a statement.

What is made up of 4 letters.
Described is made up of 9 letters.
Often is made up of 5 letters.
However is made up of 7 letters.
Rarely is made up of 6 letters.

Solution:

It is at the North Pole.

The winds are blowing towards the north till they reach the pole. The moment the pole is crossed, they are blowing towards south.

Solution:

One of the parrot have just decided to fly away. It has not yet taken that action. Thus, there are still six parrots sitting on the branch of the tree.

Solution:

Sweden and Denmark ---> Swedenmark
Russia and Belarus ---> Belarussia

Like we said, there can be many other combinations. If you have found some ones other than these, use the comments section.

Solution:

The words are:

1. LIMP
2. IDEA
3. MEAT
4. PATE

Solution:

It is one of the classic riddles. Just be careful how you are adding and you will find out.

Your mother gave you Dollar 300 and you gave her back Dollar 3. So in original, she spent just Dollar 297 on the goods. Out of those Dollar 297, Dollar 295 are with the shopkeeper and Dollar 2 were spent by you on candies.