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Mind Teasers – Here are some mind Teasers or puzzles which you will love it . I hope you will try to solve this amazing collection of puzzle ..it’s just a part 1 .we will upload 2nd post very soon .so give some love to this post.
I fly without wings, I cry without eyes.
Who am I?
Can you find out if the following statement is true?
It does not matter how much older the sibling is, their younger one will eventually be half as old as the elder one.
This statement is true but only in a specific case i.e. if both of the siblings continue to live till the day the younger is as old as the elder one was during the time of their birth.
Sweety have got some Pink and green sock in her drawer.
she had got total of 4 socks.
She pick 2 socks and chances that she get a pair of green socks is 1/2.
What is the chance of her picking a pair of Pink socks ?
I had 3 green socks and 1 Pink sock.
=> chances of pair of green socks = 1/2
chances of pair of mixed socks = 1/2
chances of pair of green socks = NULL
Four people need to cross a dark river at night.
* They have only one torch and the river is too risky to cross without the torch.
* If all people cross simultaneously then torch light wont be sufficient.
* Speed of each person of crossing the river is different.cross time for each person is 1 min, 2 minutes, 7 minutes and 10 minutes.
What is the shortest time needed for all four of them to cross the river ?
The initial solution most people will think of is to use the fastest person as an usher to guide everyone across. How long would that take? 10 + 1 + 7 + 1 + 2 = 21 minutes. Is that it? No. That would make this question too simple even as a warm up question.
Let’s brainstorm a little further. To reduce the amount of time, we should find a way for 10 and 7 to go together. If they cross together, then we need one of them to come back to get the others. That would not be ideal. How do we get around that? Maybe we can have 1 waiting on the other side to bring the torch back. Ahaa, we are getting closer. The fastest way to get 1 across and be back is to use 2 to usher 1 across. So let’s put all this together.
1 and 2 go cross
2 comes back
7 and 10 go across
1 comes back
1 and 2 go across (done)
Total time = 2 + 2 + 10 + 1 + 2 = 17 minutes.
James Bond was relaxing in his hotel room in Lyon when he heard a knock at his door. Bond opened the door and see a beautiful woman whom he had never seen in his life. She said that she is so sorry and she thought that this was her room. She was about to leave the room when the Bond takes out his pistol and ask the girl to stop.
What made Bond suspicious of the girl?
Bond was suspicious of the women as one never knocks its own door at the hotel.
Aishwarya Rai walks into a bank to cash out her check.
By mistake the bank teller gives her dollar amount in change, and her cent amount in dollars.
On the way home she spends 5 cent, and then suddenly she notices that she has twice the amount of her check.
The check was for dollars 31.63.
The bank teller gave her dollars 63.31
She spent .05, and then she had dollars 63.26, which is twice the check.
Let x be the dollars of the check, and y be the cent.
The check was for 100x + y cent
He was given 100y + x cent
100y + x – 5 = 2(100x + y)
Expanding this out and rearranging, we find:
98y = 199x + 5
or 199x ≡ -5 (mod 98)
or 98*2*x + 3x ≡ -5 (mod 98)
3x ≡ -5 ≡ 93 (mod 98)
this quickly leads to x = 31.
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