I’m tall when I’m young, and I’m short when I’m old. 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?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

What brings you down but never up?

Next Number in the Series,

5, 16, 49, 104, ?

What's the best place to go shopping in the ocean?

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?

A Monkey, a squirrel, and an Eagle are racing to the top of the mango tree. Assuming all these animals are in perfect shape, Which animal will reach to Banana first?

A blonde put eyeliner on her head. Why?