What is both possible and impossible at the same time?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

Solve the counting riddle by identifying the number of triangles in the given picture.

What goes up but never comes down?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

A Child was born in Lahore, Pakistan.

Still child is not a Pakistani citizen.why ?

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?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

Two boys were admitted to a school. When the headmaster asks them about their parents, they tell him that they have same parents (father and mother). On further inquiry, it turns out that they both share the same date for their birthday.

"Are you twins," ask the headmaster.
"No," replies the boys.

Is it possible?