#31 - IAS PROBLEM
What happened when wheel was invented?
It caused a revolution.
#33 - FAQ Puzzle
Ankit Garg holidaying abroad fell off a yacht into deep water. He could not swim and he was not wearing anything to keep him afloat. It took 30 minutes for the people on the yacht to realize someone was missing. The missing man was rescued two hours later. Why didn't he drown?
He fell into the Dead Sea, which lies between Israel and Jordan. The water is so salty and dense that anyone in it floats very easily.
#34 - Trivia Puzzle
Why do we preferably have round manhole covers and not the square ones ?
Squares have longer diagonal length and thus they may fall inside if twisted. However such is not the case with a circle one.
#35 - IAS level question
Suppose you are a girl candidate and sitting in an interview. Suddenly the interviewer asks you, 'What if one morning you wake up and find out that you are pregnant?
How will you reply to such a question ?
Normally, a single or unmarried girl might feel shocked with such a question. But if you are smart, you can answer, 'I will be quite excited and will ask you for an off to celebrate with my husband.'
Since the question is hypothetical, you don't have to take it in wrong manner and you can answer in the same hypothetical manner as well.
#36 - IAS Tricky Question
While handling a project, the landscaper is asked by the owner of the mansion that he wants four trees in front of his mansion that are exactly equidistant from each other.
How will he do it?
He will have to form the shape of a tetrahedron. This means that, he will plan three trees on the vertices of an equilateral triangle and then plant one at the exact center. In this way, all the trees will be equidistant from each other.
#37 - Critical Thinking Riddle
Bill bought a new car. He has a habit of eating ice cream from a particular ice cream shop while returning home from office. Whenever, he eats strawberry ice cream, he faces no problem. But whenever, he eats chocolate ice cream, the car starts giving problem. At first, he thinks, it is just a co-incidence but when this awkward incident happens for 3-4 times, he reports this problem to the company.
The mechanic of the company checks but finds no problem at all. The next day, when he stops by to eat chocolate ice cream, the car again starts giving problem.
Can you find the possible reason?
This is because the queue for the chocolate ice cream is very long. Thus, the engine gets cold and becomes troublesome. While the queue for strawberry ice cream is short.
#38 - NYC Hardest Logical Deduction Puzzle
You are hanging around in NYC when a person approaches you.
"Leaving the bald people aside, I can bet a hundred bucks that there are two people living in NYC who have same number of hairs on their heads," he says to you.
You say that you will take the bet. After talking to the man for a couple of minutes, you realize that you have lost the bet.
What did the person say to you that proved his statement ?
This problem can be best solved using the pigeonhole principle.
The argument will go like this:
Assume that all the non-bald people in NYC have different number of hairs on their head. The population is about 9 million and let us assume that there are 8 million among them who are not bald.
Now, those 8 million people need to have different number of hairs. On an average, people have just 100, 000 hairs on their head. If we keep on assuming that there is someone with just one hair, someone with two, someone with three and so on, there will be 7, 900, 00 other people left who will have more than 100, 000 hairs on their head and need different number of hairs.
Now, as per this assumption, if we keep increasing one hair for each person, to make everybody hair different in numbers, we will come across someone with 8, 000, 000 hairs. But that is practically impossible (even 1, 000, 000 is impossible). Thus there must be two people who are having same number of hairs.
#39 - Maths IQ Puzzle
Indiana Jones has stolen two solid gold bars from a treasure. But now, the village people are behind him. While running away from them, he comes across a bridge formed by a single rope. Now he knows that he can cross the bridge on that rope. But there is a signboard which reads that the rope can carry a maximum weight of 130 pounds only.
Now, the gold bar weighs 20 pounds each and he weighs 100 pounds. How will he cross the bridge now given that he can't leave the gold bar behind and he don't have enough time to return back and take them one by one ?
If you know about the weighing systems, you must be knowing that gold is weighed in Troy system while otherwise normally, the weight is measured using the imperial system.
In Troy system, 12 ounces = 1 pound.
In imperial system, 16 ounces = 1 pound
Thus, 40 pounds of gold weighed in Troy system will be only 30 pounds in the imperial system of weighing. The weight limit for the rope must be in imperial system only as that is the standard weighing system.
Thus the total weight = 100 + 30 = 130 pounds and all he will do is simply walk it carrying both the gold bars.