Hard Riddles

Hard riddles with answers are a true test of your brain power, reasoning and comprehension. You are sure to find these tough difficult riddles both challenging and puzzling. While these hard riddles and answers may drive you a little crazy sometimes, they may surprise you in the way they force you think out of the box.

3 Switches and 1 Light Bulb

You have a set of 3 light switches outside a closed door. One of them controls the incandescent light bulb inside the room. With the door closed from outside the room, you can turn the light switches on or off as many times as you would like.

You can go into the room – one time only – to see the light. You cannot see whether the light is on or off from outside the room, nor can you change the light switches while inside the room.

No one else is in the room to help you. The room has no windows.

Based on the information above, how would you determine which of the three light switches controls the light inside the room?

Riddle Answer

Baffling Statements

Only one of the following statements is true, which one is it?

One statement here is false.
Two statements here are false.
Three statements here are false.

Riddle Answer

The Lucas Ship Problem

“Every day at noon,” Lucas said, “a ship leaves Le Havre for New York and another ship leaves New York for Le Havre. The trip lasts 7 days and 7 nights. How many New York-Le Havre ships will the ship leaving Le Havre today meet during its journey to New York?

Riddle Answer

7 Thieves

There are seven thieves. They stole diamonds from a diamond merchant and ran away. While running, night sets in and they decide to rest in the jungle.

When everybody was sleeping, two of them woke up and decided to divide the diamonds equally among themselves. But when they divided the diamonds equally, one diamond is left.

So they woke up the 3rd thief and tried to divide the diamonds equally again but still one diamond was left. Then they woke up the 4th thief to divide the diamonds equally again, and again one diamond was left. This happened with the 5th and 6th thief – one diamond was still left.

Finally, they woke up the 7th thief and this time the diamonds were divided equally.

How many diamonds did they steal in total?

Riddle Answer

Coins in the Dark

There are twenty-six coins lying on a table in a totally dark room. Ten are heads and sixteen are tails. In the dark, you cannot feel or see if a coin is heads up or tails up.

Your task is to separate the coins into two groups so that each group has the same number of coins heads up as the other group. You may move or flip the coins. How can you accomplish this? No tricks are involved.

Riddle Answer

Hard Riddles

3 Switches and 1 Light Bulb

Baffling Statements

The Lucas Ship Problem

7 Thieves

Coins in the Dark

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