How many words can a pen with half refill write?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

Where do fish keep their money?

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?

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

I am a number I am not an odd number I am higher than 90 I am not higher than 100 If you subtract me from 100, you get nothing. What number am I?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?