Time Measurement
Use 7 and 11 after 7 passed start measuring after 11 passed upturn it and continue measuring
What do you mean by “… after 7 passed start measuring after 11 passed”?
after 7 minute hour glass sand settled down
thats what i mean
“after 7 passed start measuring … ” Start measuring what??
time
That I know! But you said “after 7 passed start measuring…’. Do you mean to say that you were not measuring till then? Also, you said ‘start measuring’ – how? Using the 11? In that case, you will end up with 7 + 11 = 18 min.
we ignore the time passed till then and then start measuring it.if u start measuring when 7 passed after both 11 and 7 were used and total time u will measure will be the time of remaining sand in hour glass of 11 =4 minutes and after upturning 11 again after the sand settled =11 minutes
4+11 = 15
The question doesn’t provide for “ignoring” any timeframe. You can’t arbitrarily insert ‘gaps’ as per convenience.
I didn’t inserted gaps I started late pls this is too foolish if you can’t see this after so much explanation. The question didn’t state you have to start measuring now
“Starting late” has the drawback that it won’t work when required immediately. e.g. If someone says ‘I am going to the store to get something. If I don’t return in 15 min., you should come to my help.’ In this situation, you can’t use your method to measure the time.
What your method actually measures is 22 minutes, NOT 15 min. as required in the question because before starting ‘your‘ measurement, you have actually ‘measured’ 7 minutes (because you waited till the 7-min glass drained out). even though you chose to ignore it. (Had you started measuring while the7-min glass was running, you could have claimed that you didn’t measure the time before starting, because you don’t know how much time had passed before you started.)
Because you do not understand a simple thing we have to measure 15 minutes it does not say now it is a question not a life problem you have thought about the use of the problem unnecessarily or its your grudge against me
When somebody asks someone to measure something, it implies that the measurement should be done when asked and not after some random time as per the other person’s convenience. If I were a nurse and you, a doctor (or my colleague), and you asked me to measure a patient’s temperature / BP, I would do it immediately when asked (unless specifically asked to wait for ‘x’ minutes) and NOT after, say, half an hour (at my convenience), claiming that you didn’t say ‘measure it now / immediately‘. As simple as that.
it is not a life problem but a puzzle if your are too dense then i cant help sorry
Start both the 7-min and 11-min glasses simultaneously. After the 7-min one runs out, turn it upside down and let it continue to run. By the time the 11-min glass runs out (11 min. passed), the 7-min. glass will have run for 4 min. after it was upturned first. Turn it upside down again and continue. It will run out in the next 4 min. , completing 15 min.
u didnt need to think this much
Your Answer
More puzzles to try-
What is the logic behind these ?
3 + 3 = 3 5 + 4 = 4 1 + 0 = 3 2 + 3 = 4 ...Read More »Defective stack of coins puzzle
There are 10 stacks of 10 coins each. Each coin weights 10 gms. However, one stack of coins is defective ...Read More »Which clock works best?
Which clock works best? The one that loses a minute a day or the one that doesn’t work at all?Read More »(Advanced) Cheryl’s Birthday Puzzle
Paul, Sam and Dean are assigned the task of figuring out two numbers. They get the following information: Both numbers ...Read More »Five greedy pirates and gold coin distribution Puzzle
Five puzzleFry ship’s pirates have obtained 100 gold coins and have to divide up the loot. The pirates are all ...Read More »Magical flowers!!
A devotee goes to three temples, temple1, temple2 and temple3 one after the other. In front of each temple, there ...Read More »Tuesday, Thursday what are other two days staring with T?
Four days are there which start with the letter ‘T‘. I can remember only two of them as “Tuesday , Thursday”. ...Read More »How could only 3 apples left
Two fathers took their sons to a fruit stall. Each man and son bought an apple, But when they returned ...Read More »How Many Eggs ?
A farmer is taking her eggs to the market in a cart, but she hits a pothole, which knocks over ...Read More »HARD MATHS – How much faster is one train from other Puzzle
Two trains starting at same time, one from Bangalore to Mysore and other in opposite direction arrive at their destination ...Read More »Most Analytical GOOGLE INTERVIEW Question Revealed
Let it be simple and as direct as possible. Interviewer : Tell me how much time (in days) and money would ...Read More »Lateral thinking sequence Puzzle
Solve this logic sequence puzzle by the correct digit- 8080 = 6 1357 = 0 2022 = 1 1999 = ...Read More »How did he know?
A man leaves his house in the morning to go to office and kisses his wife. In the evening on ...Read More »Pizza Cost Math Brain Teaser
Jasmine, Thibault, and Noah were having a night out and decided to order a pizza for $10. It turned out ...Read More »Which letter replaces the question mark
Which letter replaces the question markRead More »Which room is safest puzzle
A murderer is condemned to death. He has to choose between three rooms. The first is full of raging fires, ...Read More »Richie’s Number System
Richie established a very strange number system. According to her claim for different combination of 0 and 2 you will ...Read More »Srabon wanted to pass
The result of math class test came out. Fariha’s mark was an even number. Srabon got a prime!! Nabila got ...Read More »Become Normal!!
Robi is a very serious student. On the first day of this year his seriousness for study was 1 hour. ...Read More »Sakib Knows The Number!
Ragib: I got digits of a 2 digit number Sakib: Is it an odd? Ragib: Yes. Moreover, the sum of ...Read More »
