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

What have one eye but still cannot see?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

How many times can you subtract the number 5 from 25?

While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side.

How many houses are there between your home and your grandmother's home?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

I am beautiful, up in the sky. I am magical, yet I cannot fly. To people I bring luck, and to some people, riches. The boy at my end does whatever he wishes. What am I?

O_er_t_o_

Complete the missing letters of the given word.

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?