I have 10 red socks and 10 blue socks in a drawer. How many socks must I take out to ensure that I have at least one matching pair? One how many to ensure I have at least a pair of red and a pair of blue?
Answer: Three for one pair, and twelve to ensure one pair of each color.
Solution:
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4 Criminals Puzzle: Black and White Hats prisoner Puzzle, Who Will Shout First?
Answer: Man 2 will shout out after some time.
Solution:
Correct Answer: Man 2 will shout out after some time.
Explanation:
Here’s why: Man 3 and 4 cannot see the other hats.
Man 1 sees a white hat and a black hat and knows his hat can be black or white.
Man 2 sees one black hat , but if he is also wearing a black hat, it would be obvious to Man 1 that he is wearing a white hat. Since Man 1 did not shout out, Man 2 concluded that he himself is wearing a white hat.
Ans credits: RedTaurus
Correct Answer: Man 2 will shout out after some time.
Explanation:
Here’s why: Man 3 and 4 cannot see the other hats.
Man 1 sees a white hat and a black hat and knows his hat can be black or white.
Man 2 sees one black hat , but if he is also wearing a black hat, it would be obvious to Man 1 that he is wearing a white hat. Since Man 1 did not shout out, Man 2 concluded that he himself is wearing a white hat.
Ans credits: RedTaurus