You are given two candles of equal size, which can burn for 30 minutes each. You have to measure 45 minutes with
these candles. (There is no scale or clock ).There’s no way you can measure the height of candle . Also u r given a lighter.

You have two jars, 50 red marbles, 50 blue marbles. you need to place
al the marbles into the jars such that when you blindly pick one marble out of
one jar, you maximize the chances that it will be red. (when picking, you’ll first
randomly pick a jar, and then randomly pick a marble out of that jar) you can
arrange the marbles however you like, but each marble must be in a jar.
Put some load on you brain solution is not much hard to think.

Suppose there are 4 prisoners named W, X, Y, and Z. Prisoner W is standing on one side of a wall, and prisoners X Y and Z are standing on the other side of the wall. Prisoners X, Y, and Z are all standing in a straight line facing right – so X can see prisoner Y and Z, and Y can see prisoner Z. This is what their arrangement looks like:

W(cann’t see anything) || X(can see both Y&Z) Y(can see z) Z(cann’t see anything)
Where the “||” represents a wall. The wall has no mirrors. So, prisoner W can see the wall and nothing else.

There are 2 white hats and 2 black hats. Each prisoner has a hat on his head. Each prisoner can not see the color of his own hat, and can not remove the hat from his own head. But the prisoners do know that there are 2 white hats and 2 black hats amongst themselves.

The prison guard says that if one of the prisoners can correctly guess the color of his hat then the prisoners will be set free and released.

Question :Figure out which prisoner would know the color of his own hat?

Note that the prisoners are not allowed to signal to each other, nor speak to each other to give each other hints. But, they can all hear each other if one of them tries to answer the question. Also, you can assume that every prisoner thinks logically and knows that the other prisoners think logically as well.

You have three jars that are all mislabeled. One contains peanut butter jelly
beans(Label :PB), another grape jelly jelly beans(Label : GB), and the third has a mix of both(Label :MIX) (not necessarily a 50/50 mix, could be a 1/99 mix ora 399/22 mix).

Question :How many jelly beans would you have to pull out, and out of which jars, to find out how to fix the labels on the jars?

Four people are on this side of the bridge. the bridge will be destroyed by a bomb in 17 minutes. everyone has to get across before that. Problem is that it’s dark and so you can’t cross the bridge without a flashlight, and they only have one flashlight. Plus the bridge is only big enough for two people to cross at once. The four people walk at different speeds: A fella is so fast it only takes him 1 minute to cross the bridge, B takes 2 minutes, C 5 minutes, the D it takes 10 minutes to cross the bridge. when two people cross the bridge together (sharing the flashlight),
they both walk at the slower person’s pace. can they all get across before the bridge blows up? Mentioning the speeds once again :
Person A: 1 minute
Person B: 2 minutes
Person C: 5 minutes
Person D:10 minutes

There are 8 identical coins.One of these coins is counterfeit and is known to be lighter than the genuine coins. What is the minimum number of weightings needed to identify the fake coin with a two-pan balance scale without weights?