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April 27, 2009

Mary's Car

The Old car of Mary requires tyres to be changed after each 24000 km.
If she wants to go for 42000 km journey then how many minimum
number of tyres she will need ?

April 22, 2009

There is a bus with 7 girls........

There is a bus with 7 girls.

Each girl has 7 bags.

In each bag, there are 7 big cats.

Each big cat has 7 little cats.

Each cat has 4 legs.

How many legs are present in the bus?

April 17, 2009

Cake cutting puzzle

What is the maximum number of slices can you obtain by cutting
a cake with only 4 cuts?

April 9, 2009

Clock Puzzles

If a clock takes 7seconds to strike 7, how long will the same
clock take to strike 10?

April 6, 2009

Pond with Lillies

There is one lily in the pond on 1st june. There are two in
the pond on 2nd june . There are four on 3rd june and so on.
The pond is full with lilies by the end of the June.

(i) On which date the pond is half full?

(ii) If we start with 2 lilies on 1st June when will be the pond
be full with lilies.


There are 19 red balls and one black ball. Ten balls are put
in one jar and the remaining 10 are put in another jar.
What is the possibility that the black is in the right jar.

April 2, 2009

Probability Riddles

Two Persons A and B. Person A picks a random number from 1 to 1000.
Then person B picks a random number from 1 to 1000. What is the
probability of B getting number greater then what A has picked?

Escalator Puzzles

There is an Escalator and 2 persons move down it.A takes 50 steps
and B takes 75 steps while the escalator is moving down.
Given that the time taken by A to take 1 step is equal to time taken
by B to take 3 steps. Find the no. of steps in the escalator
while it is stationary ?