Critical Thinking Puzzles

305,5013,30592,105763958 ?

2017-02-26T20:47:00.000+05:30

What is the next number in this sequence: 305,5013,30592,105763958,__?

200 Fishes in Aquarium Puzzle

2017-02-20T23:23:00.003+05:30

There were 200 Fishes in an aquarium, 99% of which were red. How many red fishes must be removed to make the percentage of red fishes 98%?

Guess the Computer Password ?

2017-02-12T15:28:00.001+05:30

A man locked his personal computer with a password and wrote some phrases in the hint box. One day his wife tries to login in his absence using the hints which contained following: 4 grapes 1 apple 7 bananas 7 mangoes 2 pineapples 1 orange 8 pomegranates

What is the password?

WILL YOU CRACK THE CODE ?

2016-12-27T08:04:00.001+05:30

Hint1 - 682: One number is correct and well placed
Hint2 - 614: One number is correct but wrong place
Hint3 - 206: Two numbers are correct but wrong places
Hint4 - 738: Nothing is correct
Hint5 - 870: One number is correct but wrong placed

Can you crack the lock code with the help of the hints given ?

Find the 9 letter word _a_s_o_i_ ?

2016-10-16T13:43:00.002+05:30

Complete this 9 letter word _a_s_o_i_ with the given clue.

1) girls love it
2) boys use it
3) parents hate it
4) mobiles scared of it

Meena’s father is Arun Puzzle

2016-06-26T15:18:00.000+05:30

Meena's father is Arun.Then Arun is the ________of Meena's father.

1111=5, 2222=24, 3333=93, 4444=272, 5555=?

2016-06-21T13:00:00.001+05:30

If 1111=5,

2222=24,

3333=93,

4444=272 then 5555=?

0 0 0 = 6, 1 1 1 = 6, 2 2 2 = 6 Puzzle

2016-05-26T00:45:00.000+05:30

Solve this

0 0 0 = 6
1 1 1 = 6
2 2 2 = 6
3 3 3 = 6
4 4 4 = 6
5 5 5 = 6
6 6 6 = 6
7 7 7 = 6
8 8 8 = 6
9 9 9 = 6

In the space you can use any kind of mathematical signs like addition subtraction divison etc.
But you cannot bring up new numbers

I am a 6 letter word

2016-05-25T09:18:00.000+05:30

I'am a 6 letter word;
First 4 is me
2 and 6 are same letters
1,2,6 means look
4,6,2 means type of payment

Who am l?

What is Jennie’s Age?

2016-05-09T09:06:00.000+05:30

Gracie went for a morning walk and met her old friend Suzie and her daughter Jennie after a long time. Gracie asked Suzie how old is Jennie to which Jennie replied “In two years I will be twice as old as I was three years ago”. How old is Jennie?

Make 100 with the sequence 987654321

2016-05-06T09:31:00.002+05:30

Can you make 100 out of the sequence of non-zero digits 987654321 in order by placing plus or minus signs between them. The result of thus described arithmetic operation will be 100.

Puzzle - January 713, February 823

2016-05-04T09:26:00.001+05:30

Here is a list showing the month and a number for each month.

January 713
February 823
March 531
April 542
May 351
June 462
July 471
August 683

Decode the logic and find the number for September = ?

Nine Children in a House Puzzle

2016-04-14T23:39:00.002+05:30

There are nine children in the house, and only them in the house so

A is ironing
B is watching tv
C is cooking
D is playing chess
E is bathing
F is listening radio
G is sleeping
I is dressing

And what is H doing right now?

Birth Probability Puzzle

2016-02-21T19:39:00.001+05:30

James and Catherine are a married couple. They have two children, one of the child is a boy. Assume that the probability of each gender is 1/2.
What is the probability that the other child is also a boy?

338 Cows and Goats Puzzle

2016-01-17T15:51:00.000+05:30

There are 338 cows and goats in a farm. 2/3 of the cows are equal to 1/5 of the goats in the farm.
How many cows are there in the farm?

A Shop Selling 3 Chocolates for Re. 1 Puzzle

2016-01-08T10:20:00.001+05:30

A Shop was selling 3 chocolates for Re. 1 and if you return three wrappers you get one free. If so, how many chocolates can you get for Rs. 45 ?

Lateral Thinking Riddle

2015-12-21T23:41:00.001+05:30

On a windy rainy night , I was driving in my car. When i reach the bus stand , i see three people waiting for the bus.

1. An old lady who needs an immediate medical attention
2. My Best Friend
3. Girl whom i love from childhood

My car is a two seater, so can you tell me , what i have done in this situation ?

IAS Interview Puzzle : Priya’s father is Arun !

2015-12-04T08:44:00.000+05:30

Priya’s father is Arun. Then Arun is the ________ of Priya’s father.

100 Coins Puzzle

2015-11-26T01:02:00.001+05:30

You have a 100 coins laying flat on a table, each with a head side and a tail side. 10 of them are heads up, 90 are tails up. You can't feel, see or in any other way find out which side is up. Split the coins into two piles such that there are the same number of heads in each pile.

10 Cigaratte Butts Puzzle

2015-11-10T13:27:00.003+05:30

Bruce is an inmate in a large prison, and like most of the other prisoners, he smokes cigarettes. During his time in the prison, Bruce finds that if he has 3 cigarette butts, he can cram them together and turn them into 1 full cigarette. Whenever he smokes a cigarette, it turns into a cigarette butt.
One day, Bruce is in his cell talking to one of his cellmates, Steve.
"I really want to smoke 5 cigarettes today, but all I have are these 10 cigarette butts," Bruce tells Steve. "I'm not sure that will be enough."
"Why don't you borrow some of Tom's cigarette butts?" asks Steve, pointing over to a small pile of cigarette butts on the bed of their third cellmate, Tom, who is out for the day on a community service project.
"I can't," Bruce says. "Tom always counts exactly how many cigarette butts are in his pile, and he'd probably kill me if he notices that I had taken any."
However, after thinking for a while, Bruce figures out a way that he can smoke 5 cigarettes without angering Tom. What is his plan?

Count the Number of Squares

2015-11-03T17:02:00.000+05:30

There are three squares in the picture and it is overlapping and forms 2 more squares.
What is the greatest number of squares you can make by overlapping three squares of the same size?

Palindromic Clock

2015-10-28T23:10:00.001+05:30

On a 12-hour digital clock, what is the smallest interval between two times that are palindromic (can be read forwards and backwards as the same number)?

Peculiar Number Puzzle

2015-10-22T10:26:00.000+05:30

I just found a number with an interesting property:
When I divide it by 2, the remainder is 1.
When I divide it by 3, the remainder is 2.
When I divide it by 4, the remainder is 3.
When I divide it by 5, the remainder is 4.
When I divide it by 6, the remainder is 5.
When I divide it by 7, the remainder is 6.
When I divide it by 8, the remainder is 7.
When I divide it by 9, the remainder is 8.
When I divide it by 10, the remainder is 9.

It's not a small number, but it's not really big, either.
Find the smallest number with such property.

12 men on an island riddle

2015-10-08T16:49:00.000+05:30

There is an island with 12 islanders. All of the islanders individually weigh exactly the same amount, except for one, who either weighs more or less than the other 11.
You must use a see-saw to figure out whose weight is different, and you may only use the see-saw 3 times. There are no scales or other weighing device on the island.

How can you find out which islander is the one that has a different weight?

100 employees in a conference room

2015-10-01T12:10:00.002+05:30

There are 100 employees in a conference room in New York City. You note that 99% of them are managers. How many managers would need to leave the conference in order to reduce the percentage of managers in the hall to 98%?