Lte's solve the equation below:
What is the value of A,B,C,D&E?
Burn the rope
There are two rope with different size, as known that each of them need 1 hours to be burn finish.
In this case, how you confirm a time 15 minutes interval by burning this two rope
IQ test again
Inside a room have three light and outside the room have 3 switches. We are not able to see the house from outside of room.
In this case, if only allow you go inside the room once, how you know which is the right switch for the three of the light?
Can you know their age?
Go through the communication below:
A: How many children do you have
B: Three
A: May I know how old are them?
B: Let's me give you some hint and see whether you can find it out. Three of their age multiply together is 72.
A: The nformation is insufficient for me to get the answer.
B: Is true, you might go out and see my house number, their age add together is equal to my house number
A went out and see the house nymber then return back and say: The information still not enough for confirm your childrens age.
B: Tell you what, my youngest son like to eat cake a lot.
A: I get it, their age is .......
Base on the communication between A & B, could you find out each of the three children age
Find the fake gold coin
There are 10 packs , each pack contain 10 units of gold coin.
As known that
1. One of the pack contain 10 units of fake gold coin, the rest of packs contain real gold coin.
2. The real gold coin wieght is 10g per unit, and the fake gold coin weight is only 11g.
Now, give you a weighting machine and request you to find out which pack is contain fake gold coin. However, you are only allow to use this weighting machine for 1 time.
The question is
How to use a weighting machine 1 time to find out the pack with fake gold coin.
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.
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