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 bought me for dinner but never eat me. What am I?

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

I can write cow in 13 letters.

Can You?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

What is the largest number you can write with just 3 digits?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

What's a single-digit number with no value?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

If an electric train is travelling south, then which way is the smoke going?