Logic Puzzles Questions

Q:

Logical puzzle

You want to send a secret message to your friend Alex in the mail. But Sam, who you don't trust, has access to all your mail. So you put your message in a box with a lock. But you are not allowed to send a key! How can you get your message through securely?

Answer

- Send the box with the lock to Alex. 


- Alex can't open it, but can put another lock on the box. 


- Alex sends this box with the 2 locks back to you, you unlock your lock and send it back to Alex again.


- So there is just Alex's lock on the box and Alex can now open it.

Report Error

View answer Workspace Report Error Discuss

Subject: Logic Puzzles

17 4328
Q:

I have keys but no locks, I have space but no room. You can enter but can't go outside. What am I?

keys1531119373.jpg image

Answer

I am Keyboard.


A Keyboard has keys of letters, space button and enter button.

Report Error

View answer Workspace Report Error Discuss

Subject: Logic Puzzles Exam Prep: AIEEE , Bank Exams , CAT , GATE , GRE
Job Role: Analyst , Bank Clerk , Bank PO , IT Trainer

16 4305
Q:

Logical puzzle

Dr.Will wants to operate for three different persons who were wounded. But he had only two surgical gloves. There is not any blood contact between the three persons. How can Dr.Will operate for the three people with two pair of surgical gloves?

Answer

First, Dr.Will wear both of the gloves, one above the other. He operate the first person. After finishing he remove the outer pair of gloves as inside out and place it in a tray. Then operate the second person. Now he will wear the first gloves as inside out above the second gloves. Operate the third person. At last he remove the gloves and dispose them.

Report Error

View answer Workspace Report Error Discuss

Subject: Logic Puzzles

25 4288
Q:

Logical puzzle

At a restaurant, how could you choose one out of three desserts with equal probability with the help of a coin? What if the coin is biased and the bias is unknown?

Answer

Our solution:


Toss the coin twice.
Let TH, HT and TT correspond to the three choices.
And if you get HH, just repeat (so it takes 8/3 tosses on average).


BIASED COIN

If the coin was biased, TH and HT would occur with equal probability.
So you could assign THHT, HTTH and THTH to the three choices, with other 4-toss outcomes rejected.
Or you could assign HTT, THT and TTH to the three choices, with other 3-toss outcomes rejected.

Report Error

View answer Workspace Report Error Discuss

Subject: Logic Puzzles

18 4287
Q:

Logical puzzle

You have 10 coins….arrange them in 4 straight lines such that each line contains 4 coins.

Report Error

View answer Workspace Report Error Discuss

27 4267
Q:

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?

A) 2 B) 4
C) 8 D) 1
 
Answer & Explanation Answer: D) 1

Explanation:

Given total number of the cubicles = 8

Given that only 1/8 of the cubicle is painted

 

Then of the total 8 cubicles, 1/8 is

 

1/8 x 1 = 1 cubicle. 

Report Error

View Answer Report Error Discuss

Filed Under: Logic Puzzles
Exam Prep: AIEEE , Bank Exams , CAT , GATE , GRE
Job Role: Analyst , Bank Clerk , Bank PO

16 4107
Q:

I am lighter than air but a hundred people cannot lift me?

What am I?

Answer

A bubble is what lighter than air but a hundred people cannot lift me.


bubble11585559583.jpg image


 


 

Report Error

View answer Workspace Report Error Discuss

Subject: Logic Puzzles Exam Prep: CAT , Bank Exams , AIEEE
Job Role: Bank PO , Bank Clerk , Analyst

18 4092
Q:

I am the first on Earth, the second in Heaven. I appear two times in a week you can only see me once in a year. Although I am in the middle of the sea, l am not found in month, but l am in February, June, September, October, November & December.

Who am I?

Answer

The letter 'E'.


As of the above given data,


It is in the 1st place in Earth, 2nd in Heaven and in the middle of the Sea.


It appears once in a Year and twice in a Week.


It is present in February, June, September, October, November & December.


But not in the Month.


 


Hence, it is the letter 'E'.

Report Error

View answer Workspace Report Error Discuss

15 4025