# All Puzzles

• A road is divided into two ways.  One leads to City of truth and the other leads to City of Lies. All the people belonging to City of Truth always tell truth and all the people belonging to City of Lies  always lie.

There are two people standing at the division,  one from City of Truth and the other from City of Lies. You don’t know who belongs to which city.
You can ask only one question to any one of the two people standing there to determine which way leads to the City of Truth and which leads to City of Lies.

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• At an eBay auction, a woman’s ring and a filigree jewelry box with a hand-painted ceramic top are on sale for \$200.00 Dollars. The jewelry box is valued at \$190.00 Dollars more than the ring. How much is the ring worth?

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pnikam Expert
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• ```Implement the function boolean isPalindrome (int n);

Which will return true if the bit-wise representation of the integer
is a palindrome and false otherwise.```
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• Tricky question, be attentive-
There are four airplanes flying in four different directions. Each of the plane navigates a straight line at a constant speed. Please keep in mind that none of the two planes are flying parallel with each other. They began flying at the same time long time ago. Sometimes, even a collision takes place but the strong build, makes the planes continue with the journey. But even the sturdy built can only survive two collisions and after that the plane will crash.

Out of the six possible collisions, five have already taken place (do note that the collisions did not involve more than two planes at one time). Two planes have already crashed. What will be the fate of the remaining two planes?

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• A bridge will collapse in 17 minutes.

4 people want to cross it before it will collapse. It is a dark night and there is only one torch between them.

Only two people can cross at a time.

“A” takes a minute to cross.
“B” takes 2 minutes.
“C” takes 5
and “D” takes 10 minutes

How do they all cross before the bridge collapses?

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Anand Guru
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• Albert and Bernard just became friends with Cheryl, and they want to know when her birthday is. Cheryl gives them a list of 10 possible dates.

May 15 16 19

June 17 18

July 14 16

August 14 15 17

Cheryl then tells Albert and Bernard separately the month and the day of her birthday, respectively.

Albert: I don’t know when Cheryl’s birthday is, but I know that Bernard does not know, too.

Bernard: At first, I didn’t know when Cheryl’s birthday is, but I know now.

Albert: Then I also know when Cheryl’s birthday is.

When is Cheryl’s birthday?

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Anand Guru
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