What does the below image rebus riddle means ?

There is something which is always coming but never arrives?

Given below is simple addition with a defined pattern pattern:
7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

Can you analyze the pattern and find out the answer for:

4 + 9 = ?

What always comes into a house through the keyhole?

My thunder comes before lightning.
My lightning comes before my rain.
My rain dries up all the land it touches.

Who am I?

Prove that the below maths equation is true.

8 + 8 = 91

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

Check out the number list below and find what number comes next in the sequence.

111 , 113 , 117 , 119 , 123 , 137 , ?

The following four words might seem abrupt to you. But you can make them meaningful by just adding vowels.
RDSH
GGPLNT
TMT
NN

Hint: All of them are vegetables.