• Views : 50k+
  • Sol Viewed : 20k+

Mind Teasers : Quick Thinking Maths Problem

Difficulty Popularity

A petri dish kept in a lab has a colony of healthy bacteria. Every bacterium divides itself into two in exactly two minutes. Now the colony started with a single cell at 2 pm. If the petri dish was exactly half full of bacteria at 3 pm, when will the dish become full of bacteria?

Discussion
Suggestions
  • Views : 90k+
  • Sol Viewed : 30k+

Mind Teasers : Extremely Hard Civil Services Problem

Difficulty Popularity

( ) + ( ) + ( ) + ( ) + ( ) = 30
This is what you have for equation. The following are the numbers that you can use to fill in the brackets:
1, 3, 5, 7, 9, 11, 13 and 15

You can repeat the numbers if required. The resulting sum should be 30.

This question appeared in the UPSC final examination in December 2013. Out of all the people who appeared, only one guy was able to solve this namely Gaurav Agarwal.

Can you solve it?

By Admin
  • Views : 70k+
  • Sol Viewed : 20k+

Mind Teasers : How Many Seconds In A Year Riddle

Difficulty Popularity

Without the use of calculation, can you find how many seconds are there in a year ?

  • Views : 40k+
  • Sol Viewed : 10k+

Mind Teasers : Difficult Brain Twister

Difficulty Popularity

A strange tradition is followed in an orthodox and undeveloped village. The chief of the village collects taxes from all the males of the village yearly. But it is the method of taking taxes that is interesting.

The taxes paid in the form of grains and every male should pay equal pounds corresponding to his age. In simpler terms, a man aged 10 years will have to pay 10 pounds of grains and a 20 years old will be paying 20 pounds of grain.

The chief stands on a riser containing 7 different weights next to a large 2 pan scale. As per the interesting custom, the chief can only weigh using three of the seven weights.

In such a scenario, can you calculate what must be the weights of the seven weights each and who is the oldest man the chief can measure using those weights?

By Admin
  • Views : 80k+
  • Sol Viewed : 20k+

Mind Teasers : Bridge Breaks Brain Teaser

Difficulty Popularity

There is a 30km long bridge. The bridge can only support up to a weight of 2000 kg. A car that weighs 2000 kg needs to cross that bridge. When the car has reached midway of the bridge, a bird comes and sits on top of the car. The bird weighs 300 grams.

Now, does the bridge breaks down at this point of time or not?

  • Views : 80k+
  • Sol Viewed : 20k+

Mind Teasers : Popular Logic Picture Grid Problem

Difficulty Popularity

We have 4 blue, 4 red, 4 green and 4 yellow hats. All the hats must be labelled with an arithmetic sign – ‘+’, ‘-‘, ‘x’ or ‘/’ in a manner that one sign is used on a particular color only once. Now these hats must be arranged in a 4x4 grid in a manner that no two rows or columns have a repeating color or sign.

To give you a kick start, we have arranged 4 hats in the grid. Can you place the rest of them ?

By Admin
  • Views : 70k+
  • Sol Viewed : 20k+

Mind Teasers : Eden Hazard And The Two Masked People Puzzle

Difficulty Popularity

Eden Hazard the famous Chelsea footballer leave home and then he makes three left turns and returns home where he found 2 people wearing the mask.

Can you Identify the two masked people?

  • Views : 40k+
  • Sol Viewed : 10k+

Mind Teasers : Trick Answer Riddle

Difficulty Popularity

In Era of Abraham Lincoln, there is a world famous surgeon whose more than 90% surgeries are successful and yet almost all of his patients die.

Explain ?

  • Views : 50k+
  • Sol Viewed : 20k+

Mind Teasers : Pattern Series Picture Puzzle

Difficulty Popularity

Use the logical reasoning to find out the missing piece in the picture given with this question.
Find the logic in the figure given and find out the missing one.

  • Views : 40k+
  • Sol Viewed : 10k+

Mind Teasers : Popular Probability Brain Teaser

Difficulty Popularity

Kangwa, Rafael and Ferdinand plans for gun fighting.
They each get a gun and take turns shooting at each other until only one person is left.

History suggest
Kangwa hits his shot 1/3 of the time, gets to shoot first.
Rafael, hits his shot 2/3 of the time, gets to shoot next if still living.
Ferdinand having perfect record at shooting(100% accuracy) shoots last , if alive.

The cycle repeats. If you are Kangwa, where should you shoot first for the highest chance of survival?

  • Views : 90k+
  • Sol Viewed : 30k+

Mind Teasers : Tough Two Jug Measuring Puzzle

Difficulty Popularity

I got two jugs of
A) 11 liter
B) 6 liter

How can I measure exactly 9 liters ?

Submit your Email Address to get latest post directly to your inbox.

Latest Puzzles

28 April
Missing Number In The Table Puzzle

Can you replace the "?" with the appropr...

27 April
Where is the Cat Riddle

This is a picture of the nearby area of ...

26 April
13 Hearts Who am I Riddle

Got 13 hearts but never alive. Who am I ...

25 April
Baby Name Riddle

Jacqueline is pregnant and currently has...

24 April
The Pacific Quick Riddle

Balboa discovered The Pacific in 1513.

23 April
Happy Diwali Puzzle

Can you replace the each alphabet with t...

22 April
Funny Ice Cream School Riddle

In Which school do you learn the art to ...

Puzzles Tags :

Illusions Tags :