Replace the question mark with the number below given a simple math problem.

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?

Seven Robbers robbed a bank and hide the coins in a lonely place.
They decide to divide the money equally the next morning. Two greedy robbers decided to cheat the others and reach the place at night. They equally divided the coins between them, one coin left. So they called another robber and then they decided to divide equally among the three. Sadly again one coin left. The same thing happened to the 4th 5th and the 6th robber.
However, when the 7th robber reached in the morning, they can divide the coins equally.

How many coins were there in total?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

Why is Saturday stronger than Monday?

I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who Am I ?

What part of the chicken has the most feathers?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

What does this rebus means ?

PROG WORKRESS

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