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February 25, 2009

Train Puzzle

Two stations connected by railroad. Trains start every hour
from each station to the other , at the same time.
A Train takes 5 hours to reach the other station.
How many trains will a train meet during its journey?

February 18, 2009

Dice problem

Two people are playing with a pair of dies. Instead of numbers,
the dies have different colors on their sides. The first person wins
if the same color appears on both the dies and the second person
wins if the colors are different. The odds (chance)of their winning
are equal. If the first dice has 5 red sides and 1 blue side,
find the color(s) on the second one.

[really tough one]

February 16, 2009

Hilarious Puzzles

You are stuck in a room with no windows, and no doors.
The only thing in the room is a table and a mirror.
How do you get out?

February 9, 2009

Probability Problem

There are 3 bags. One contains 2 gold coins, another has
2 silver coins and the 3rd has one of each. You pick a bag
at random, and without looking inside take out one coin.
It's gold. What is the probability that the other coin
in that bag is also gold?

Bridge crossing problem

A group of four people has to cross a bridge. It is dark,
and they have to light the path with a flashlight.
No more than two people can cross the bridge simultaneously,
and the group has only one flashlight. It takes different
time for the people in the group to cross the bridge.
When two people together goes through the bridge,
the time taken by them to cross the bridge is the time taken
by the person with highest crossing time:

A crosses the bridge in 1 minute,
B crosses the bridge in 2 minutes,
C the bridge in 5 minutes,
D crosses the bridge in 10 minutes.

What is the minimum time in which they can cross the bridge.........???

Give with explanation.......!!!!!!!!

February 5, 2009

Tricky question

Mary's father has five daughters:

1. Nana
2. Nene
3. Nini
4. Nono

What is the name of the fifth daughter?