How many bananas can you eat if your stomach is empty?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

ENEMY = 2 * LINK
LINK + 2 = HELL

Then what will be TAXI + HELL? Select from the options below:
a) ROTTEN
b) DANGER
c) HEAVEN
4) MORTAL

Replace the question mark with the correct number.

2 + 2= 4
3 + 3= 18
4 + 4= 48
5 + 5= ?

How could a baby fall out of a twenty-story building onto the ground and live?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

How many triangles can you count in the figure given?

Decode this picture on T-Shirt and tell what it says ?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?