My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

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?

When can we add 2 to 11 and get 1 as the correct answer?

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

How many triangles can you count in the figure given?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

There are forty elephants and they have forty-fore heads. How can this be possible?

The answer I give is yes, but what I mean is no. What was the question?

A and B have a certain number of chocolates with them. If B gives one chocolate to A, they will have an equal number of chocolates. But if A gives one chocolate to B, then A will be left with half the number of chocolates that B has.

Can you find out the number of chocolates they have right now?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?