Prove that the below maths equation is true.

8 + 8 = 91

Replace the question mark with the correct number in below Picture:

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

Imagine you are in a room with no windows or doors. How will you get out?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Dwayne Johnson was running away with the loot from a heist in his car along with Vin Diesel. One tire was punctured and he dropped down to replace it. While changing the wheel, he dropped the four nuts that were holding the wheel and they fell into a drain. Vin Diesel gave him an idea using which they were able to drive till the rendezvous point.

What was the idea ?

I know a nine-letter word having only one vowel.
Do you ?

I have feet, but no legs. Which animal Am I?