If you say my name, I will no longer exist. What am I?

The more of this there is, the less you see. What is it?

How many letters are in the alphabet?

O_er_t_o_

Complete the missing letters of the given word.

The Puzzle: A girl, a boy, and a dog start walking down a road.

They start at the same time, from the same point, in the same direction.

The boy walks at 5 km/h, the girl at 6 km/h.

The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.
How far does the dog travel in 1 hour?

What does the following BrainBat signifies?

ABCDEFGHIJKLMNOPQRSTUVWYZ

QQQQQQQQQQQQQQQQQQQQQQQQQ.

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

I am a type of food that is often found in the fridge and can be white in colour. What I am?
Hint 1: I am a dairy product.
Hint 2: You can spread me on the bread.

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

If six children and two dogs were under an umbrella, how come none of them got wet?