Classic Puzzles

Puzzle a day keeps ‘RUSTING’
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Audience.1
Save the most precious??
• There is a flat with 3 rooms in it. 1st is filled
with gold coins, 2nd has dollar notes and 3rd
has cotton. Suddenly a massive fire broke out.
Ambulance rushes in to extinguish fire. But
due to lack of time it can save just one room.
Which room should it save?

ashish.agra1947@gmail.com

A.1 --- I hate ‘’’numbers’’’
• Predict the next number in this series and give
a logical explanation.

1 11 21 1211........



93 28 17 8 1



2 8 26 62 122 ___



2 3 3 5 10 13 ___


Audience.2
Can you think out of box??
• Join the 9 points with
four lines without lifting
pen.


B.1. Matchsticks
• Remove 4 matchsticks
from the arrangement
below so that exactly
five identical squares
remain, and every
remaining matchstick is
a part of atleast one of
these squares.


B.2. Please save priests….
• There are 3 priests and 3 dacoits on one side of the river. There is a boat to
cross the river which can take two person at a time. Atleast one of them
has to return so as to bring boat back at same end. Whenever the dacoits
are in majority at either side, they will kill the priest. How you will bring all
6 to the other side making sure no priest is killed??


B.3. Apply- Supply chain management
• Four people A,B,C,D come to a
river in the night. There is a
narrow bridge, but it can only
hold two people at a time.
Because it's night, the torch has
to be used when crossing the
bridge. Person A can cross the
bridge in 1 minute, B in 2
minutes, C in 5 minutes, D in 6
minutes. When two people cross
the bridge together, they must
move at the slower person's
pace. Note that the torch must be
with the people who are crossing
the bridge.
What would be the minimum
time required for the four people
to cross the bridge?


B.4.---- Mathematical Circles
• There are 11 circles in
total.
• Fill the circles with
digits 1-11 such that
sum across a line is
same for all.


Matchstick Game – 50 points
• Two player game.
• One player from each team will come.
• We have 28 matchsticks in total.
• Each player can pick either one or two
matchstick in one round.
• One who picks the last will win the game.


Audience.3
Flaw in the story?
• Ram goes to hear Satyanarayan Bhagwan katha at
Shyam’s house. After listening to 3 parts, he fells
asleep. In his dream he saw that he is travelling
from a superfast train. On the same track another
superfast train is coming in opposite direction.
Massive collision takes between the trains. Ram
gets so afraid in his dreams that he dies in real.
After the katha got ended, Shyam tries to wake
him up to find him dead. Considering this to be a
real story where is the flaw?


C.1. Chalo Bag khozein
• There are 10 bags each with 10 coins. Weight
of each coin is 10gm. But in one of the bag all
coins are 9gm in weight.
• You are given a spring balance which can be
used only once.
• Find out the bag with defective coins?


C.2. Which way to go?
• You're travelling to some village. At some point
there is a fork in the road. You could go two ways
but only one of them leads to the village.
• Lucky for you there are two men standing next to
the fork. But unfortunately one of them always
lies and one always speaks the truth and you do
not know who is who.
• Since the men do not really like to help you, you
are allowed to ask one of them only one
question. Which question should you ask?

C.3. Change the setting
• You are allowed to move only 3 coins.


C.4. ----- How to fill boxes??
• An apple vendor has 1000 apples and 10
empty boxes. He has to place all in such a
manner that if a customer asks for any
number of apples from 1 to 1000, he should
be able to pick them in terms of boxes.
• Given that any number of apples can be put in
one box.


Audience.4
Positioning
• Fill the 8 cells with
digits 1-8 so that no two
consecutive digits are in
cells touching each
other in any fashion.


Audience.5
Superstitious Boss
• Mr. Fisher is a night watchman in a large company. On a certain
morning when Mr. Fisher wants to go home, his boss tells him: "I'll
go for a business trip to Norway.
• Tomorrow I will depart from Heathrow airport." Mr. Fisher however
advises him to take a boat. "Why should I?" asked the president.
• "This night I dreamed that the plane to Norway crashes, just before
it will land," is the response. The president smiles first,
• but since he is pretty superstitious he decides to take the boat.
When he arrives in Norway, he is told that the plane which he
should have taken had crashed.
• When the president returns from the trip, he gives a big reward to
Mr. Fisher and immediately fires him. Why?


Audience.6
Bechara Snail
• A snail is at the bottom of a 20 meters deep
pit. Every day the snail climbs 5 meters
upwards, but at night it slides 4 meters back
downwards.
• How many days does it take before the snail
reaches the top of the pit?


Audience.7
Out of box part-2
• A into 2 equal parts
• B into 3 equal parts
• C into 4 equal parts
• D into 5 equal parts


Audience.8
Every king has one ‘Birbal’
• A king was about to die. He had two sons. He wanted
to divide the kingdom equally. But both sons were
greedy and they wanted whole kingdom. So, king kept
a proposal. He organized a horse riding race. The punch
of the race was the horse which reaches first, the
owner will lose the race. Race started. If Ram took a
break for an hr, Shyam takes for two hrs and vice versa.
So, the race was not looking to get finished in near
future. King called the most intelligent guy of his
Darbar. The person said something to both the sons.
They resumed race and race finished quickly. What that
person would have said?


Solution


Audience.1
Which is more precious??
• Solution:
– Ambulance never extinguishes fire.


A.1. I hate ‘’’numbers’’’
• 1 11 21 1211 111221

• Solution
– 1, Ek baar ek , do bar 1 , 1 baar 2 1 baar 1


A.2.

93 28 17 8 1
• Solution :
– (multiply unit place and tens place digits) + 1


A.3.

2 8 26 62 122 ___
• 1^3 +1 , 2^3 + 0, 3^3 -1 , 4^3 -2…..


• Predict the next • 2+1=3
number in this series • 3*1=3
and give a logical • 3+2 = 5
explanation.
• 5*2 =10
2 3 3 5 10 13 • 10+3 =13
___ • 13*3 =39


B.2. Please save priests….
• Solution:
– Let priest – P and Dacoit – D
– P1 D1 goes , P1 comes back.
– D2 D3 goes, D2 comes back.
– P1 P2 goes, P1 D1 comes back.
– P1 P3 goes, D3 comes back.
– D3 D2 goes, D3 comes back and finally
– D3 D1 goes…..


B.3. Pehle kaun
• Solution:
– 1,2 goes and 1 comes
back (3min)
– 5,6 goes and 2 comes
back ( 8min)
– 1, 2 goes (2min)
– Total we need 13min


B.4.--- Mathematical Circles
• There are 11 circles in
total. 11
6 10
• Fill the circles with
digits 1-11 such that 5 9
sum across a line is
same for all.
1
• Solution: fill one in the
4 8
centre
3 7
2

C.1. Chalo Bag Khojein
• Take one from bag 1, two from bag 2, three
from bag 3 and so on....Sum should be
550..what ever more/less wt is will tell us the
bag.


C.2. Which way to go?
• --------if i ask 2nd person which is the right
path what will he say...


C.3. Change the setting
• You are allowed to move only 3 coins.
• Move all the three corner once.


C.4… How to fill boxes??
• We will keep it in the sequence 1,2,4,8,….
• Fundamental of binary digits comes into
picture.
• 10bits together form 1024 combinations.
Same way 10 boxes can be filled in a manner
that we can get any figure between 1 to 1024
apples.


Audience.4
• Solution
– Trick is to write the
extreme digits in the
3 5
middle.
7 1 8 2
– Once we have written 1 6
4
and 8 in middle two,
then 2 will be at right
hand most cell and 7 will
be in left hand most cell
and so on.


Audience.5
The superstitious Boss
• He was not supposed to sleep in night...so, he
got reward for saving life but since he didn’t
do his job properly so he was fired.


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