Really hard riddles bring you the riddles that cannot be solved easily. These are the true test of your mental power and comprehension. You need to focus a lot while solving these riddles. They demand for an attentive and intelligent mind.

Start solving and exercising your brain.
  • Views : 40k+
  • Sol Viewed : 10k+

#1 - Toughest Long Logic Puzzle

Difficulty Popularity

The puzzle question is : On Bagshot Island, there is an airport. The airport is the home-base of an unlimited number of identical airplanes. Each airplane has a fuel capacity to allow it to fly exactly 1/2 way around the world, along a great circle. The planes have the ability to refuel in flight without loss of speed or spillage of fuel. Though the fuel is unlimited, the island is the only source of fuel.
What is the fewest number of aircraft necessary to get one plane all the way around the world assuming that all of the aircraft must return safely to the airport? How did you get to your answer?
Notes:
(a) Each airplane must depart and return to the same airport, and that is the only airport they can land and refuel on ground.
(b) Each airplane must have enough fuel to return to airport.
(c) The time and fuel consumption of refueling can be ignored. (so we can also assume that one airplane can refuel more than one airplanes in air at the same time.)
(d) The amount of fuel airplanes carrying can be zero as long as the other airplane is refueling these airplanes. What is the fewest number of airplanes and number of tanks of fuel needed to accomplish this work? (we only need airplane to go around the world)

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

#2 - Detective Hercule Murder Mystery Puzzle

Difficulty Popularity

Hercule Poirot Detective reviewed the information they had on the case so far.

A lady named 'monica' was found shot and Hercule already had a list of suspects : rooney , torres , dabid , messi , ronaldo
Killer is a fan of Hercule and chalenge him by leaving notes at various places.

# The first was found in a drawing room.
# The second was found in an art room.
# The third was in a bed room.
# the fourth in an ice-cream room.
# The fifth at the desk room

All of the notes read the same thing, 'The clues are where you find the notes.' Still , nothing was found anywhere.
Hercule Poirot pause for a moment and den arrested the killer. Who was the killer ?

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

#3 - Crossing The River In Minimum Time Puzzle

Difficulty Popularity

Four people need to cross a dark river at night.

* They have only one torch and the river is too risky to cross without the torch.
* If all people cross simultaneously then torch light wont be sufficient.
* Speed of each person of crossing the river is different.cross time for each person is 1 min, 2 minutes, 7 minutes and 10 minutes.

What is the shortest time needed for all four of them to cross the river ?

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

#4 - Interview Marble Logic Puzzle

Difficulty Popularity

You are given a set of scales and 12 marbles. The scales are of the old balance variety. That is, a small dish hangs from each end of a rod that is balanced in the middle. The device enables you to conclude either that the contents of the dishes weigh the same or that the dish that falls lower has heavier contents than the other.
The 12 marbles appear to be identical. In fact, 11 of them are identical, and one is of a different weight. Your task is to identify the unusual marble and discard it. You are allowed to use the scales three times if you wish, but no more.

Note that the unusual marble may be heavier or lighter than the others. You are asked to both identify it and determine whether it is heavy or light.

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

#5 - 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 ?

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

#6 - Hard Logical Puzzle

Difficulty Popularity

You are the ruler of a medieval empire and you are about to have a celebration tomorrow. The celebration is the most important party you have ever hosted. You've got 1000 bottles of wine you were planning to open for the celebration, but you find out that one of them is poisoned.

The poison exhibits no symptoms until death. Death occurs within ten to twenty hours after consuming even the minutest amount of poison.

You have over a thousand slaves at your disposal and just under 24 hours to determine which single bottle is poisoned.

You have a handful of prisoners about to be executed, and it would mar your celebration to have anyone else killed.

What is the smallest number of prisoners you must have to drink from the bottles to be absolutely sure to find the poisoned bottle within 24 hours?

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

#7 - Tough Logic Problem

Difficulty Popularity

My Friend Einstein, who loves gardening, planted the apple trees in an ordered way. He planted apple trees in 19 rows. What is the fewest number of apple trees required by Einstein to have trees in such an ordered way?
Note: More than 2 trees in a row will count as a row.


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

#8 - Difficult Sequence Riddle

Difficulty Popularity

What is the next number in this sequence ?

4,12,84,3612 ?

  • Views : 60k+
  • Sol Viewed : 20k+

#9 - Pattern Age Puzzle

Difficulty Popularity

If neha is 10
Both Sonali and priyanka is 15
Both sadaf and tanu is 10.

how much is prinka by the same system ?

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

#10 - Unsolvable Mathematical Puzzle

Difficulty Popularity

The Puzzle: Here is a famous prize problem that Sam Loyd issued in 1882, offering $1000 as a prize for the best answer showing how to arrange the seven figures and the eight 'dots' .4.5.6.7.8.9.0. which would add up to 82

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