If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

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

You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

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?

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?