Wednesday, 10 June 2015
Scrap 19
Answer: Both would be at same distance.
Solution:
Both would be the same distance from City Chennai, since they are at a same point.
Scrap 18
Answer:
The deaf and mute man gave him two 50 rupees notes, so the man in the booth knew he wanted several tickets. Otherwise, he would have given him only one 50 note. This would work with any change equaling 50 rupees.
Scrap 17
Answer:
There are two reasons:
- First, Ajay is double counting a lot of the days. A lot of the time spent sleeping, eating, and relaxing occurs during weekends and the summer. Weekends also occur during the summer, so all of these hours are getting counted several times.
- Secondly, school isn't an all-day thing. So the 4 days actually represents more days of school. If school is 6 hours per day, those four days represents 16 days of school.
Scrap 16
Answer: Zero.
Solution:
The plant won't grow any vegetables, a tomato is a fruit! But the plant will grow 21 tomatoes.
Scrap 13
Answer:
Tip the glass of water until the water reaches the rim of the glass and if the water lines up perfectly with the bottom rim of the glass, it is half full.
Scrap 12
Answer: 9 minutes.
Solution:
Each path has an equal chance of occurring and if B or D are chosen they will just add 8 or 2 minutes to the time because the rat must restart the maze:
time = (1/4)×5 + (1/4)×(8 + time) + (1/4)×(3) + (1/4)×(2 + time).
Time = 9 minutes.
Scrap 11
Answer: Take 10 coins, make it a pile and flip them. Remaining coins form another pile.
Solution:
The piles don't need to be the same size, so make a pile of 10 coins and a pile of 90 coins, flip all of the ten coins and it is guaranteed that the piles have the same number of tails.
Scrap 9
Answer: 13112221.
Solution:
Each number describes the previous number. Starting with 1, the second line describes it 11 (one 1). Then the third line describes 11 as 21 (two 1's). Then the fourth line describes 21 as 1211 (one 2, one 1). This is the pattern.
Scrap 8
Answer: 3 and 4.
Solution: Since Ram knows the sum of the numbers (x + y) he would only know the answer immediately if the sum was 4 (2 + 2) or 5 (3 + 2). Then when Krishna (who knows x × y) knew that Ram didn't know the answer the product must have several numbers that add up to the sum (7 = 3 + 4, 7 = 5 + 2). When Krishna doesn't know the answer at this point we know the product must have more than one pair of viable factors (12 = 3 × 4, 12 = 6 × 2). At this point Ram knows the numbers are 3 and 4 because they are the only numbers that meet these criteria.
Scrap 7
Answer: H.e just doesn't take the bet
Solution:
This gives him a 100 percent chance of getting the money home. If he takes the bet with 1 die he has a 50 percent chance of winning. If he takes the bet with 2 dice he has about a 56 percent chance of winning. If he takes the bet with 3 dice he has about a 42 percent chance of winning.
Scrap 6
Answer: Five.
Solution:
He makes 4 cigarettes with the 16 butts. Then he smokes them and has 4 more butts to make another cigarette.
Scrap 5
Answer: Yes.
Solution:
By changing your answer your chances of winning actually goes up from 1/3 to 2/3. This becomes obvious when expanding the example. Suppose there was 100 doors rather than 3. You pick one and the host shows you that the car is not behind 98 of the doors then asks you to switch to the remaining door or keep the door you picked. Of course you would switch your door because chances are you didn't pick the correct door initially. For more explanation go to http://en.wikipedia.org/wiki/Monty_Hall_problem#Solutions
Scrap 4
Answer: In
the back.
Solution:
The train will be accelerating so it will be going faster when the back of the train enters the tunnel so a person in the back will spend less time in the tunnel.
Scrap 3
Answer: C. (0%)
Explanation:
No matter which answer you choose you are incorrect. All of the answers create a logic loop.
Scrap 2
Answer: The feathers.
Solution:
A pound of feathers is measured in avoirdupois weight, in which one pound equals 16 ounces. Precious metals are measured in troy weight, in which one pound equals 12 ounces. However, the ounces are not measured in the same way. In avoirdupois weight, one ounce = 437.5 grains. In troy weight, one ounce = 480 grains. So, one pound of feathers weighs (16) × (437.5 grains) = 7,000 grains. One pound of gold weighs (12) × (480 grains) = 5,760 grains.
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