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

Can you find the least possible number such that

If the number is divided by 3, it gives the remainder of 1;
If the number is divided by 4, it gives the remainder of 2;
If the number is divided by 5, it gives the remainder of 3;
If the number is divided by 6, it gives the remainder of 4.

What is the next number?

77, 49, 36, 18 ?

John is asked to stand behind Jacob and Jacob is asked to stand behind John. Both of them feel confused about it and don't know what to do?

But it is quite possible, do you know how?

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

You’re out on the water and see a boat filled with people. You look away for a second and look back again, but this time you don’t see a single person on the boat. Why? Hint: The boat did not sink.

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

What's the best place to go shopping in the ocean?

What does the below image rebus riddle means ?

Can you fill the blank with the correct number?

6 30 870 756030 _____