Solution:

You can do it by two methods. However, we are explaining only one and leaving one for you to figure out yourself.

What you will do is fill the 3 liters jar and pour it into the 5 liters jar. Fill the 3 liters jar again and pour it into the 5 liters jar till it's full. Now we know that the 5 liters jar was already having 3 liters of water, thus you would be able to fill 2 liters only. In that case, the 3 liters jar will be left with 1 liter water. Empty the 5 liters jar and then pour the remaining 1 liter from 3 liters jar to the 5 liters jar. Refill the 3 liters jar and pour it completely into the 5 liters jar which already had 1 liter water. Thus now the 5 liters jar have 4 liters of water.

Solution:

Turn the first switch on and keep it on for a few minutes. Now switch it off and turn on the second switch and enter the room. If you see that the bulb is lit, then you know that the second switch is connected to the bulb. If the bulb is off, then touch it. If the bulb is hot, the first switch is connected with it and if it is cold, then the third switch is connected to it.

Solution:

Now the statement of A can be true only when both of the parts are true. If we assume that B is an honest speaker, A would be honest too which will make B a liar and it will conflict. Thus we know that B is a liar. Now B said that A is telling the truth, but since he is a liar, then A is clearly lying.

Thus the first statement of A is a lie and B is not a lying bot. Although, B is lying which means he is not a bot and thus B is a lying man. The second statement made by A says that A is a bot and thus A is a lying bot.

Solution:

58 minutes

If you see the net progress of the hiker, it is one feet per minute. The most common answer is therefore 60 minutes or an hour. But if you consider the situation, after 58 minutes, he would have climbed the mountain and would be on top of it, thus he will not slip back.

Solution:

The argument of Chris Evans is quiet flawed as he fails to differentiate between purchasing and consuming.