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:

Either your read from start or from ends, it will be same

Solution:

I + IX = X

The equation read from the other side becomes X = XI + I which is false.

Solution:

Both of them were sitting in the opposite directions of the table with their backs facing each other.

Solution:

Four

As the window was closed it is obvious that the six candles that were not extinguished were lit till they melted away entirely. Thus only four candles that were extinguished remain at the end.

Solution:

Align the toothpicks to form TEN. Use one toothpick for each of the lines.

Solution:

Cycle

Solution:

November, Their calandar was 13 days behind ours.

Solution:

If they are standing back to back, then it is possible.

Solution:

He simply suggested that one of the brothers will be allowed to divide the land but he must take into consideration that it will be the other one who will have a choice of selecting his land between the two halves first.

Thus both will be happy in such manner.