#191 - Extraordinary Riddle
Something Extraordinary happened on May 6th 1978 at 12:34am what was that?
At that moment, the time, and day could be written as '12:34 5/6/78'
#192 - A Riddle
A bus driver was heading down a street in Delhi. He went right past a stop sign without stopping, he turned left where there was a 'no left turn' sign and he went the wrong way on a one-way street. Then he went on the left side of the road past a cop car. Still - he didn't break any traffic laws. Why not?
He was walking
#193 - Statement Riddle
'Ferrari driver' easily beats the 'force Indian driver' in a two-car race.How did Indian newspapers truthfully report so to look as 'force Indian drive' had outdone the 'Ferrari driver'
Think ?
The Indian newspaper reported (correctly) that the 'Ferari driver' came in next to last while the 'force india driver' came in second..
#194 - Professor Riddle
A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number
A: I do not know your number.
B: Neither do I know your number.
A: Now I know.
There are four solution for this.What are they ??
2-3
3-4
7-8
9-10
#195 - Hard Short Riddles
1)How is the moon like a dollar
2)Why is the letter I like Delhi?
3)What is the shortest complete sentence in the English language
4)If you have me, you want to share me. If you share me, you haven't got me. What am I?
5)How could a cowboy ride into town on Friday, stay two days, and ride out on Friday
1)they both have 4 quarters.
2)They both r capital of India.
3)Go.
4)Secret.
5)His horse is named Friday!
#196 - Famous Elevator Puzzle
A man who lives on the tenth floor takes the elevator down to the first floor every morning and goes to work. In the evening, when he comes back; on a rainy day, or if there are other people in the elevator, he goes to his floor directly. Otherwise, he goes to the seventh floor and walks up three flights of stairs to his apartment.
Can you explain why?
The man is a of short stature. He can't reach the upper elevator buttons, but can push is with his umbrella.
#197 - Water Jugs Problem
Six jugs are in a row.
The first three are filled with coke, and the last three are empty.
By moving only one glass, can you arrange them so that the full and the empty glasses alternate?
Move and then pour all coke from second glass to fifth glass.
#198 - Detective Puzzle
There are five people. One of them shot and killed one of the other five.
We know following clues:
1. Dan ran in the NY City Marathon yesterday with one of the innocent men.
2. Mike consider being a farmer before he moved to the city.
3. Jeff is a top notch computer consultant and wants to install Ben new computer next week.
4. The murderer had his leg amputated last month.
5. Ben met Jack for the first time six months ago.
6. Jack has been in seclusion since the crime.
7. Dan used to drink heavily.
8. Ben and Jeff built their last computers together.
9. The murderer is Jack brother. They grew up together in Seattle.
Consider yourself to be a famous detective "Sherlock Homles", Can you find the killer?
Jeff Killed Mike
1. Jack is not the murderer because he is the brother of the murderer.
2. Dan can't be the murderer since he ran a marathon, and the murderer recently had his leg amputated, and wouldn't be running a marathon of any magnitude that quickly.
3. Ben is not the murderer if he just met Jack since Jack and the murderer grew up together.
4. This leaves Jeff and Mike.
Since Jeff is still alive (he wants to install a new computer next week, present tense) he must be the murderer. Mike also didn't grow up with Jack. It has been determined that Jack, Dan, and Jeff are all alive. Ben must also be alive since Jeff plans to install Ben computer next week. This means that Jeff killed Mike.
#199 - Cross Bridge Puzzle
Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?
17 mins
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 mins. 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 mins
#200 - Ant Problem Probability Quiz
Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?
So let’s think this through. The ants can only avoid a collision if they all decide to move in the same direction (either clockwise or anti-clockwise). If the ants do not pick the same direction, there will definitely be a collision. Each ant has the option to either move clockwise or anti-clockwise. There is a one in two chance that an ant decides to pick a particular direction. Using simple probability calculations, we can determine the probability of no collision.