The centre of the third figure is empty. What digit should fit inside?

Count the number of lines in the image below ?

If eleven plus two equals one, what does nine plus five equal?

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

Decode below rebus
D
N
A
T
S , D

Three friends decide to distribute the soda cans they had among them. When all of them had drunk four cans each, the total number of cans that remained was equal to the cans each one of them had after they had divided the cans.

Can you calculate the total number of cans before distribution?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

I have Rs.50 and I spend it in the way as below.

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

What is the largest number you can write with just 3 digits?