An arm points north, east, south, then west.
Ever in circles, never pausing to rest.
It passes its brother twenty three times,
As the sun passes by and the moon starts to climb.
What is it?
You have a 4 minute sand clock and a 7 minute sand clock, you need to measure 9 minutes while using both of them. What's your first move?
(The 'Google Riddles' are interview questions those who wish to get hired were asked).
Well since you know you are not one of the cursed you can go down a tunnel yourself but you want a good answer from the rest so you split the groups in three leaving two left. Let those two go down one tunnel and the other six go down two separate tunnels as well. When you all meet back 20 minutes later either you have found the tunnel or someone else. Now look at the rule majority rules. If the group of three has 2 people saying it wasn't down that tunnel then you should know it wasn't down that tunnel and one of the liars have been spotted. Same with the other group of three as well as the group of two. Judging by the answers the groups gave you, you should go down the right tunnel and head to safety while the spirits possessing the two people should leave and all is well.
5 pirates are parting ways after finding a treasure of 100 pieces of gold. The pirates decide to split it based on a vote. Each pirate, from oldest to youngest, gets to propose a plan on how to split the gold.
If at least 50 percent of the other remaining pirates agree on the plan, that is how they will split the gold. If less than 50 percent of the pirates agree, the pirate who came up with the plan will be thrown overboard. Each pirate is smart, greedy, and wants to throw as many others overboard as possible without reducing the amount of gold they get.
What plan can the first (oldest) pirate propose to live and get as much gold as possible?
He can propose a plan that he gets 98 pieces of gold, the 3rd pirate gets 1 piece, and the 5th pirate gets 1 as well.
If there were just 2 pirates the younger pirate would definitely deny the plan so he could get all of the gold.
If there were 3 pirates the first pirate can offer the second pirate 1 piece of gold and take the rest himself because the second pirate wouldn't get anything if he has to propose a plan himself.
If there were 4 pirates the first pirate could take 99 for himself and offer 1 to the youngest pirate. They would both agree. If the youngest disagrees then he won't get any gold in the next plan.
So when there are 5 pirates it is in the interest of the 3rd and 5th pirate to accept 1 piece, because if they don't they won't get anything in the next plan.
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