Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

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?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

Find the value of "?" in the ball picture Riddle below:

In the image below, can you find the value of an angle(y)

While house hunting in London, I came across a very good leasehold property Discussing the lease the landlady told me:

'The property was originally on a 99 years lease and two-thirds of the time passed is equal to four-fifths of the time to come. Now work it out for yourself and see how many years are to go!

If 21x = 79x, what is the value of x?

In a mathematical quiz, you are asked the following question:

Use three 9s in a mathematical expression without dividing or multiplying to form the number one.

Can you answer the question?

Find the number of squares in the below-given picture.