What is so fragile that saying its name breaks it?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

Why Wine Glass Stem is so long?

On a bright sunny day, two fathers took their son fishing in the lake. Each man and son were able to catch one fish. When they returned to their camp, there were only three fishes in the basket. What happened?

PS: None of the fish were eaten, lost, or thrown back.

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

A cricket has 6 legs, a squirrel has 4 legs and a spider has 8 legs.

In a local zoo, it was found that the total number of legs is 612. Also, there are equal number of each of the above animals/insects.

Can you find out how many animals are there in the zoo?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

Spot what is wrong here in below Picture?

There was a strange boy who was born before his father. How can this be possible?

Why are televisions attracted to people?