What is so fragile that saying its name breaks it?

Can you find out the missing number in the grid?

A boy collects white seashells from the sea and brings them home every night. When he has enough of them, he decides to sell them to a trader.

The trader is ready to buy the shells and he asks the boy about the quantity. At this, the boy starts calculating. He has a giant box that contains 3 mini boxes. Two of them have another mini box inside. If the giant box can hold 50 shells, how many brown shells can he sell to the trader?

A cat, a dog and a monkey were stolen. 3 suspects got caught: Harish, Manoj and Tarun. All we know is each person stole one animal, but we do not know who stole which. Here are the investigation statements. Harish said: Tarun stole the cat. Manoj said: Tarun stole the dog. Tarun said: They both were lying. I did not steal the cat or the dog. Later on, the police found out the man who stole the monkey told a lie. The man who stole the cat told the truth. Can you find out who stole which?

A blonde put eyeliner on her head. Why?

What is the word or phrase?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

Find three numbers such that When we multiply three numbers, we will get the prime numbers. The difference between the second and the first number is equal to the third and second.

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?