បង្កើន​ចំណេះ​ដឹង​ គណិតវិទ្យា

អ្នក​ពូកែ​គិត គំនិត​ទូលាយ​ ភ្ជាប់​នឹង​សំពាយ នៃ​ចំណេះ​ដឹង

Category Archives: គណិតវិទ្យាឡូសិក

Trick Questions (1)

There is a casino and it has 4 gates (let’s name them as gate A, B, C and D). Every time you come inside the casino, you have to pay $5 and every time you leave the casino, you again have to pay $5. Also know that, whatever amount of money you carry with you inside the casino, it doubles. For example if you carry $5, it will become $10. You have to go inside the casino through gate A, come out of B, again go inside the casino through gate C and finally come out of gate D. Now, how much money should you carry inside the casino so that when you finally come out of the gate D, you should be left with no (zero amount) money?

(see the answer below)

អាន ច្រើនទៀតនៃប្រកាសនេះ

គណិតវិទ្យា-ការចែកមរតក

A man has $1,000,000 he wishes to divide up in his will. He wants to give each person named in his will an amount of money, in dollars, which is a power of 7 ($70=$1, $71=$7, $72=$49, $73=$343, …).

He does not want to give more than six people the same amount. How can he divide the money?

Answer: អាន ច្រើនទៀតនៃប្រកាសនេះ

What is the smallest integer?

What is the smallest integer greater than 0 that can be written entirely with zeros and ones and is evenly divisible by 225?

Answer: អាន ច្រើនទៀតនៃប្រកាសនេះ

How old are they?

Person x and y have the following conversation:

x: I forgot how old your three kids are.
y: The product of their ages is 36.
x: I still don’t know their ages.
y: The sum of their ages is the same as your house number.
x: I still don’t know their ages.
y: The oldest one has red hair.
x: Now I know their ages!

Answer: អាន ច្រើនទៀតនៃប្រកាសនេះ

កំសាន្តសំនូរ​ តក្កវិទ្យា

Problem:

Of three men one man always tells the truth, one always tells lies, and one answers yes or no randomly. Each man knows which man is who. You may ask three yes/no question to determine who is who. If you ask the same question to more than one person you must count it as question used for each person whom you ask.

What three questions should you ask?

Answer: អាន ច្រើនទៀតនៃប្រកាសនេះ