What does this mathematical rebus means ?

What does this below rebus puzzle mean?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

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

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

A man wants to cross the pit of fire which is 25 feet in length and he has 2 planks(fire resistant) 19 feet in length. How can he cross the pit of fire alive?

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

Can you find the hidden animal in the picture below?