Time to flight

There are 100 seat inside the air-plane, the number is start form 1 and end with 100.
100 passagers get the number from 1 to 100, they will follow the sequent to find their seat (Mean the number one shall go in first and followed by number and so on).
If they found that their seat have been sat by other people, then they will just simplily sit on the empty seat.

One day, a mad guy get the number 1 ticket (other passager are all "normal"), he just randomly sit. In this case, what is the Probability of the 100th people (who get the number 100) to sit on the right seat(seat number 100)?

Relax your mind

I'm suprised when i saw many people giving the wrong answer for the below question.

Question:
If 1=5
2=25
3=125
4=625
5=?

Tell me your answer

Ball and balances

There are 8 balls with same in apperance, but one of them are slightly heavier. Now, give you a Balances and allow you to use only 2 times to find the heavier ball.
How you going to make it?

Equation

Can you solve the below equation by using 1~25 (each number oly allow to use 1 time)

Note: People who know the trick can solve this within 2 minutes. How much time you need?

How much loss?

Mr.Blue buy a earring with cost $18, then he pricing this earring $21 for sell. A pretty girl with sexy body walk in buy this earring.

She give $100 to the boss, but the boss do not have change for the sexy girl. Then he went to the pet shop and exchange the money. After that, he give back the sexy lady $79.

The next day, the boss of the pet shop come to Mr>blue and said that the $100 is fake and request this Mr.Blue to return the $100 to him. What to do? Mr.Blue has to return back the $100 to the pet shop's boss.

Well, the question is how much Mr.Blue loss in this case?

Jeff again

Jeff was skip from the punishment after get your help 3 days ago.
His boss give him 3 empty bottles this time. The volume of the bottle are 300ml, 500ml & 800ml.
The boss request to get 2 bottles of 400ml water this time.

Jeff is facing problem again and he would like to get some help.

So, Can you solve this problem again for Jeff?

How to?

Jeff is a poor guy, his boss always like to test on him. If he can not do, then punishment will be applied to him
One day, Boss ask Jeff come to his room and give him 2 empty bottles.
The boss told Jeff the volume of the empty bottle is 5L & 6L, and he would like Jeff to get 3L of water by using this 2 bottles.

Can you help this poor Jeff to solve this problem?

Let's solve the equation

Lte's solve the equation below:

What is the value of A,B,C,D&E?

Can You solve this question?

Below is a Maths question:

Fill in the ? with 1~9 (each number only allow to apeear once)

IQ: How many you can buy?

There is a promotion in hotel, they are selling a coke with $1.50 per tin. At the same time, if you can exchange 3 empty tin to 1 tin of coke.
And now, you have $30, and the question is what is the maximum coke you can drink?
Assume that you can even dribk 100 of tins.

Cows Mathematic question?

A farmer, died when left behind several cows, according to his posthumous :
1. Wife: half of all the cow plus half ;
2. Eldest son: the balance after wife took plus half cow;
3. Second son: the balance after eldest son took plus half cow;
4. Eldest daughter: the balance after second son took plus half cow;
The result is no cow has been killed, also has not cow extra or less.

The question is:
How many cows the farmer left behind when he died

Monkey and Banana Mathematics Question

Beside a little monkey has 100 bananas, it must pass through 50 meters to its' home, each time it only able to moves 50 bananas or less, it walks 1 meter have to eat one banana.

The question is:
What is the maximum quantity of bananas that monkey able to bring back home.


Hints: He may lay down the banana half way, but must guarantee that every time it walks one meter must have one banana to eat.