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

What does this rebus means ?

Let's play a word game. Following are some meaningless words that can be completed by adding random letters on either side of the word.

For example, the word "rdo" can be formed into "pardon".

Using the same technique, can you complete the given words?
ecalc
airb
rinci
tibac
uidel
gorit
igna
eyho

Spot 5 differences in two Christmas tree below:

You can see three almost identical images below. Can you spot the odd one out from them?

Prove that the below maths equation is true.

8 + 8 = 91

How can one talk without saying a single word?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

John is pretty weird. He likes toffees but hates chocolates. He loves books but never reads. He likes to build his troops in an online game but does not proceed with the war. He likes to go swimming but is afraid of water.

Seeking this behaviour, can you tell whether he likes balloons and parties?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?