Once while in his court, King Akbar asked Birbal to write something on a wall that makes one sad when read in good times and makes one happy when read in sad times.

He took only a few moment and wrote something that fit the requirements. What did he write?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

Create a number using only the digits 4,4,3,3,2,2,1 and 1. So i can only be eight digits. You have to make sure the ones are separated by one digit, the twos are separated by two digits the threes are separated with three digits and the fours are separated by four digits

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

In a classic wine shop, the list of three most popular wines are:
- The cost of 1 French wine bottle: 500$
- The cost of 1 German wine bottle: 100$
- The cost of 20 Dutch wine bottles: 100$

John entered the wine shop and he needs to buy
- All three types of wine bottles.
- Needs to buy Dutch wine bottles in multiples of 20.
- Need to buy 100 wine bottles in total.

John has only 10000$. How many wine bottles of each type, John must buy?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

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

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

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

If you say my name, I will no longer exist. What am I?