Product of Two Numbers generate Maximum value

Puzzle # 14

Using the digits 1 up to 9, two numbers must be made. The product of these two numbers should be as large as possible. All digits must be used exactly once.

• By Multiplying only Two Numbers say A & B, Maximum Value needs to be generated
• These two numbers A and B should cover all the digits from 1 to 9.

True Magical Number

Puzzle # 13

A Very Magical Number(Dividend) that leaves a reminder that is one less than number(Divisor) that was used to perform the division

• When Magical Number(Dividend) divided by 2 leaves Reminder 1.
• When Magical Number(Dividend) divided by 3 leaves Reminder 2.
• When Magical Number(Dividend) divided by 4 leaves Reminder 3.
• When Magical Number(Dividend) divided by 5 leaves Reminder 4.
• When Magical Number(Dividend) divided by 6 leaves Reminder 5.
• When Magical Number(Dividend) divided by 7 leaves Reminder 6.
• When Magical Number(Dividend) divided by 8 leaves Reminder 7.
• When Magical Number(Dividend) divided by 9 leaves Reminder 8.
• When Magical Number(Dividend) divided by 10 leaves Reminder 9.

What is the Magical Number (Dividend) ??
Magical Number is not very small neither too big. Think of it!!

Passing on a Truck over a bridge

Puzzle # 12

There is a bridge that can withstand a total weight of Maximum 10 Tons. Above which the bridge will be collapsed !

• Bridge covers a total distance of 5KM.
• This bridge is maintained by highly authorised officials who will thoroughly check the vehicle before allowing to passed over it.
• Under any circumstance, officials are allowed Max of 10 Tons over the bridge.

A Truck weigh exactly 10 Tons(Load + Truck + Driver..) i.e it includes everything? It is allowed to cross over the bridge and after covering a distance of 4.75KM. A crow (Max - 1.5 KG) came and sat over the truck. Luckily bridge didn't got collapsed. What could be the reason behind this? When driver didn't dropped any of his items or truck parts!!

Ants moving towards Corners

Puzzle # 11

There are 'n' ants at 'n' corners of a 'n' sided closed regular polygon, they randomly start moving towards another corner that is adjacent to it. 

• If n = 5, PENTAGON.. i.e., 5 ants positioned at 5 corners are started moving towards other possible corners
• If n= 6, HEXAGON.. i.e., 6 ants positioned at 6 corners are started moving towards other possible corners
• If n = 8, OCTAGON.. i.e., 8 ants positioned at 8 corners are started moving towards other possible corners
• So on and So Forth.

What is the probability that they don't collide?

Combination of pieces on Chess board

Puzzle # 10

How many ways are there to arrange the sixteen black or white pieces of a standard international chess set on the first two rows of the board?

• Each square can hold only one chess piece
• All eight Pawns are identical
• Similarly each rook, knight and bishop are identical to its pair.

What could be the possible combinations to arrange the chess pieces on chess board?

Find Total Number of Zeroes

Puzzle # 9

A certain street has 500 buildings. A sign-maker is contracted to number the buildings from 1 to 500. Agreement was made such that contractor will be given with an dollar amount of total Zeroes, that he used to number the buildings?

• Contractor follows some special Convention to earn more amount of dollars

What could be the Count of Zeroes used by contractor ? 
What is the convention followed to gain more dollar amount?

Car on a wild stormy Night

Puzzle # 8

You are driving down the road in your car on a wild, stormy night, when you pass by a bus stop and you saw three people waiting for the bus:

• An old lady who looks as if she is about to die.
• An old friend who once saved your life.
• The perfect partner you have been dreaming about.

Knowing that there can only be one passenger in your car, whom would you choose?

Help Frogs to reach their Destination

Puzzle # 7

There are 2 sets of frogs which need to cross over the other frogs coming in opposite direction to reach their destinations. Each Set has 3 Frogs coming in opposite direction as shown below. 

• Frog can directly jump over a vacant stone only, if vacant stone is immediate next to him.
• Frogs can jump over other frog immediately coming opposite to him to land on vacant stone.
• Frogs can travel only in the faced direction. Back and forth is not possible.

3 Light Bulbs and its Switches

Puzzle # 6
There is a house and a store room is located far away from house. There are 3 Incandescent bulbs arranged in store room. Three Switches to control these bulbs are located in house. Need to identify the correct switch and bulb only visiting store room once. Conditions are as below:

• Each switch can be made On/Off to make the respective bulb glow.
• Only One bulb should glow at a time.
• Emitted light rays are not visible outside the store room, when switched on the bulb.
• All the bulbs are in Good condition.

People to cross River in a Boat

Puzzle # 5

There are 8 people, who need to cross a river in  single boat. People are 1 Cop, 1 Thief, 1 Man and his 2 Daughters, 1 Women and her 2 sons. As usual the conditions that has to be satisfied while crossing the River are given below:

• When Police man is not on that river bank, Thief will beat all the people available on that river bank.
• When Women is Not on that river bank, Man will beat her 2 sons.
• When Man is Not on that river bank, Woman will beat his 2 daughters.
• Only Two people can travel in the boat at any given time.
• 2 Sons and 2 daughters doesn't know to drive the boat.

No one should beat anyone and satisfying above conditions every one should reach other side of river bank safely !! How ?

Identify Odd one with Electronic Balance

Puzzle # 4
There are 10 containers and each container has 10 marbles. Unfortunately one of the container has a wrong set up of marbles which turns out to be over weight when compare to other containers.

How to identify the wrong container that has different set of marbles using Electronic balance? More constraints and hints are given below :

• Electronic balance should be used only one time.
• 10 containers look alike, each container has definite 10 marbles.
• In one container wrong set of marbles are placed which turn out to be overweight.
• All marbles inside any container are same in weight i.e., If Nine valid container has 10 marbles and each marble weigh x grams. In misplaced container has 10 marbles and each marble inside that container weigh y grams (y > x).

Identify Odd one with Common Balance

Puzzle # 3
There are 9 Eggs available in the basket. Among them only eight eggs are good and one egg is spoiled, because of which spoiled egg got reduced in weight.

How to identify the spoiled egg with the help of common balance? Puzzle isn't over yet these are the conditions while identifying the rotten egg

• There are no additional weights supplied to measure the egg(s) weight.
• Only Common balance and 9 egg(s) should be used to identify the spoiled one.
• Common balance should be used only two times.
• Solution should be obtained under all probable condition during weighing.

Measure Time with Candles

Puzzle # 2
A Candle is produced in such a way that total time taken by it to burn completely is 10 mins. A person needs to measure a time of 15 mins. 

Puzzle is not completed, there are few constraints on candle :

• Candle will not burn evenly i.e., it will take 10 mins to burn completely but not of uniform length. 
• A person has only 2 candles with him.

Merchant and his Gold Coin

Puzzle # 1

There is a Gold Shop and merchant has promised to give a Gold coin to any of his worker. But, merchant is so clever that he will give away the coin only if the worker fulfill his conditions 

• Worker has to work in the shop for seven consecutive days.
• On every day merchant has promised to give his share equally.
• Merchant has decided to cut the Gold coin only twice in seven day(s)