Which is the smallest number that you can write using all the vowels exactly once?

What breaks yet never falls, and what falls yet never breaks?

It spends most of its day eating white, but when it’s quick enough, it gets to eat fruit and sometimes some blue things. It’s in a dark room, where the walls are blue, it runs from a ghost that roams the halls and haunts it all the time. What is it?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

What number do you get when you multiply all of the numbers on a telephone's number pad?

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?

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

He loves to dance, twist and prance, he shakes his tail, and as a way he sails, wingless he flies into the sky. What is he?

Can you count the number of squares in the figure below?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?