Can you make four (4) nines (9) equal 100?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

If 1+9+8=1, what is 2+8+9?

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?

I am quite hot but become too cold if you remove the first two letters. What am I?

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

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

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?

Alex opened 24 presents
Jonah opened 8 presents
Clara opened 1 present

Can you find out how many presents were opened by Candy?