Solution:

She was born 2012 BC

Solution:

See the figure for the answer. Wasn't it a bit tricky?

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:

Kid1, he was left with one rock.

Solution:

Since the door is not visible in this picture, the bus is moving in the left direction.

Solution:

If you see the picture, they formed a pentagonal shape and achieved the required.

Solution:

Difference 1
Toy plane direction is different.

Difference 2
On the clock, number 1 & 2 is missing.

Difference 3
The colors of lamp's light is changed.

Difference 4
The ribbon on the gift is missing.

Difference 5
Duck is added in the gift section.

Solution:

White should move the rook from
A1 to D1 and hence complete the castling move.

Solution:

The mules is moving in circular path and hence outside legs travels more distance than inner legs.

Solution:

Treasure Map Is Hidden Inside The Hanging Room Floor.

Explanation.
Just reverse the text "roolF mooR gnignaH ehT edisnI neddiH sI paM erusaerT".

Solution:

Read the question carefully again. New Year do falls after Christmas but that happens if two different years. The question is put up against the year 2050 and thus there will be 51 weeks and 2 days in between them as New Year will appear on 1 January 2050 and Christmas will happen on 25 December 2050.