Logic Riddles

Question: You have a flashlight that takes 2 working batteries. You have 8 batteries but only 4 of them work.

What is the fewest number of pairs you need to test to guarantee you can get the flashlight on?

Question: There is an island with exactly 201 residents, 100 with blue eyes, 100 with brown eyes, and the island leader (who has green eyes). To leave the island, one must know their own eye color. There are no reflective surfaces on the island and no on can communicate with each other other than the leader to the residents. No one on the island knows how many of each eye color there is. Everyone on the island is a perfect logician, meaning that if there us a solution they'll find it. Every morning the leader gives anyone a chance to leave the island by guessing their eye color. One morning, the leader gathers all 200 residents to make an announcement, he says "at least 1 person on this island has blue eyes" How many people leave the island and in how many days after the announcement? Notes: this is known as one of the hardest riddles ever

Question: Take your time do not fear Sadly I am never clear My answer stares you in the face Read me over and over just incase My answer will cause you pain But a smile you will gain Today I am like a July evening dream To find my answer you may need a team What am I

Question: There is a man who is very rich. He has a daughter who is turning 16 and he wants to throw a party for her. He invited all the men in the kingdom. At the party the man invites everyone out to the pool. The pool is infested with salt water crocodiles. The rich man says, "Whoever can swim across this pool and come out alive, can either have 1 million dollars or marry my daughter." Then there was a splash! They looked over to see a man swimming across the pool with his clothes getting ripped apart. He gets to the end and jumps out. "Congratulations! Do you want to marry my daughter or $1,000,000! What did the man say?

Question: How can you flip the shape upside down by moving only two of the sticks?