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You are in a room with three doors. You find out that behind two of these doors, the darkest pit of hell is waiting for you to make a mistake. The other door leads to heaven, where you obviously want to go.

Each door is guarded by a guard:

• Michael, who tells truth with 75% chance;
• Vlad, who lies with 90% chance;
• John, who lies with 70% chance.

You do not know who is who or which door he guards. You may ask each guard 2 questions max but no more than 4 questions in total, because those guys do not like long conversations.

The other thing you have is a magic stone that can be used only once. This stone makes the event with the lowest chance to occur.

You cannot use the stone to do this with multiple events or with an event that has a few independent probabilities. (You cannot ask 2 of the guards at once using the stone). Also, the stone does not count random events.

What is the easiest way which gives you the most chances to go to heaven?

Hint: Be as quiet as possible

You are in a room with three doors. Behind two of them, the darkest pit of hell waits for you to make a mistake. The other door leads to heaven and freedom.

Each door is guarded by a guard:

• Michael, who tells truth with 75% chance;
• Vlad, who lies with 90% chance;
• John, who lies with 70% chance.

You do not know who is who or which door he guards. You may ask each guard 2 questions max but no more than 4 questions in total, because those guys do not like long conversations.

The other thing you have is a magic stone that can be used only once. This stone makes the event with the lowest chance to occur.

You cannot use the stone to do this with multiple events or with an event that has a few independent probabilities. (You cannot ask 2 of the guards at once using the stone). Also, the stone will not take into account any random events as you use it.

What is the easiest way which gives you the most chances to go to heaven?

Hint: Be as quiet as possible

You are in a room with three doors. You find out that behind two of these doors, the darkest pit of hell is waiting for you to make a mistake. The other door leads to heaven, where you obviously want to get.

Each door is guarded by a guard:

• Michael, who tells truth with 75% chance;
• Vlad, who lies with 90% chance;
• John, who lies with 70% chance.

You do not know who is who or which door he guards. You may ask each guard 2 questions max but no more than 4 questions in total, because those guys do not like long conversations.

The other thing you have is a magic stone that can be used only once. This stone makes the event with the lowest chance to occur.

You cannot use the stone to do this with multiple events or with an event that has a few independent probabilities. (You cannot ask 2 of the guards at once using the stone). Also, the stone does not count random events.

What is the easiest way which gives you the most chances to go to heaven?

Hint: Be as quiet as possible

You are in a room with three doors. You find out that behind two of these doors, the darkest pit of hell is waiting for you to make a mistake. The other door leads to heaven, where you obviously want to go.

Each door is guarded by a guard:

• Michael, who tells truth with 75% chance;
• Vlad, who lies with 90% chance;
• John, who lies with 70% chance.

You do not know who is who or which door he guards. You may ask each guard 2 questions max but no more than 4 questions in total, because those guys do not like long conversations.

The other thing you have is a magic stone that can be used only once. This stone makes the event with the lowest chance to occur.

You cannot use the stone to do this with multiple events or with an event that has a few independent probabilities. (You cannot ask 2 of the guards at once using the stone). Also, the stone does not count random events.

What is the easiest way which gives you the most chances to go to heaven?

Hint: Be as quiet as possible

You are in a room with three doors. You find out that behind two of these doors, the darkest pit of hell is waiting for you to make a mistake. The other door leads to heaven, where you obviously want to get.

Each door is guarded by a guard:

• Michael, who tells truth with 75% chance;
• Vlad, who lies with 90% chance;
• John, who lies with 70% chance.

You do not know who is who or which door he guards. You may ask each guard 2 questions max but no more than 4 questions in total, because those guys do not like long conversations.

The other thing you have is a magic stone that can be used only once. This stone makes the event with the lowest chance to occur.

You cannot use the stone to do this with multiple events or with an event that has a few independent probabilities. (You cannot ask the 2 guards using the stone). Also, the stone does not count random events.

What is the easiest way which gives you the most chances to go to heaven?

Hint: the solution lies on the surface.

You are in a room with three doors. You find out that behind two of these doors, the darkest pit of hell is waiting for you to make a mistake. The other door leads to heaven, where you obviously want to get.

Each door is guarded by a guard:

• Michael, who tells truth with 75% chance;
• Vlad, who lies with 90% chance;
• John, who lies with 70% chance.

You do not know who is who or which door he guards. You may ask each guard 2 questions max but no more than 4 questions in total, because those guys do not like long conversations.

The other thing you have is a magic stone that can be used only once. This stone makes the event with the lowest chance to occur.

You cannot use the stone to do this with multiple events or with an event that has a few independent probabilities. (You cannot ask 2 of the guards at once using the stone). Also, the stone does not count random events.

What is the easiest way which gives you the most chances to go to heaven?

Hint: Be as quiet as possible