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### Top 10 Hard Level Riddles

Top 10 Hard Level Riddles / Questions

Hard Level Riddles 1 : Alexander Puzzle
Difficulty ★★★★☆     Popularity ★★★★★

Alexander is stranded on an island covered in forest.

One day, when the wind is blowing from the west, lightning strikes the west end of the island and sets fire to the forest. The fire is very violent, burning everything in its path, and without intervention the fire will burn the whole island, killing the man in the process.

There are cliffs around the island, so he cannot jump off.

How can the Alexander survive the fire? (There are no buckets or any other means to put out the fire)

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Hard Level Riddles 2 : Pyramid Number Puzzle
Difficulty ★★★★☆     Popularity ★★★★★

The below is a number puzzle. It should be read left to right, top to bottom.
1
1 1
2 1
1 2 1 1
1 1 1 2 2 1
? ? ? ? ? ?
? ? ? ? ? ? ? ?
Question 1: What is the next two rows of numbers?

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Hard Level Riddles 3 : Challenging Puzzle
Difficulty ★★★★☆     Popularity ★★★★★

Outside a room there are three light switches. One of switch is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb ??

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Hard Level Riddles 4 : Hard Math Riddle
Difficulty ★★★★☆     Popularity ★★★★★

Take 9 from 6, 10 from 9, 50 from 40 and leave 6.

How Come ??

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Hard Level Riddles 5 : Famous Probability puzzle SHOOT
Difficulty ★★★★☆     Popularity ★★★★☆

Mr. Black, Mr. Gray, and Mr. White are fighting in a truel. They each get a gun and take turns shooting at each other until only one person is left. Mr. Black, who hits his shot 1/3 of the time, gets to shoot first. Mr. Gray, who hits his shot 2/3 of the time, gets to shoot next, assuming he is still alive. Mr. White, who hits his shot all the time, shoots next, assuming he is also alive. The cycle repeats. If you are Mr. Black, where should you shoot first for the highest chance of survival?

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Hard Level Riddles 6 : Famous Elevator Puzzle
Difficulty ★★★★☆     Popularity ★★★★☆

A man who lives on the tenth floor takes the elevator down to the first floor every morning and goes to work. In the evening, when he comes back; on a rainy day, or if there are other people in the elevator, he goes to his floor directly. Otherwise, he goes to the seventh floor and walks up three flights of stairs to his apartment.
Can you explain why?

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Hard Level Riddles 7 : CAT EXAM Riddle
Difficulty ★★★★☆     Popularity ★★★★☆

There is a shop that reads:
10 for \$2.00
100 for \$3.00
I needed 913 and still only paid \$3.00. How could this be financially viable for the shop-keeper?

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Hard Level Riddles 8 : Mystery Puzzle Sherlock Holmes
Difficulty ★★★★☆     Popularity ★★★☆☆

One snowy night, Sherlock Holmes was in his house sitting by a fire. All of a sudden a snowball came crashing through his window, breaking it. Holmes got up and looked out the window just in time to see three neighborhood kids who were brothers run around a corner. Their names were John Crimson, Mark Crimson and Paul Crimson.
The next day Holmes got a note on his door that read '? Crimson. He broke your window.'
Which of the three Crimson brothers should Sherlock Holmes question about the incident?

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Hard Level Riddles 9 : Friday The 13th Riddle
Difficulty ★★★★☆     Popularity ★★★☆☆

Many people would think Friday the 13th will be an unlucky day. Is it possible that there is no Friday on 13th through the whole year? How many Fridays at 13th can we have in a year at most? Can you calculate it out?

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Hard Level Riddles 10 : September Riddle
Difficulty ★★★★☆     Popularity ★★★☆☆

man gave one son 10 cents and another son was given 15 cents. What time is it?