Brain Teasers & Puzzles

Two women were selling marbles in the market place —one at three for a paise and other at two for a paise. One day both of them were obliged to return home when each had thirty marbles unsold. They put together the two lots of marbles and handing them over to a friend asked her to sell them at five for 2 paise. According to their calculation, after all, 3 for one paise and 2 for one paise was exactly the same as 5 for 2 paise.
But when the takings were handed over to them, they were both most surprised, because the entire lot together had fetched only 24 paisel If however, they had sold their marbles separately they would have fetched 25 paise.
Now where did the one paise go? Can you explain the mystery?View SolutionSubmit Solution 799.9K views
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My friend Shuba works in a post office and she sells stamps. One day a man walked in and slamming seventyfive paise on the counter requested, ‘Please give me some 2 paise stamps, six times as many one paisa stamps, and for the rest of the amount make up some 5 paise stamps.’
The bewildered Shuba thought for a few moments and finally she handed over the exact fulfilment of the order to the man—with a smile.
How would you have handled the situation?View SolutionSubmit Solution 798.9K views
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There are eleven different ways of writing 100 in the form of mixed numbers using all the nine digits once and only once. Tenof the ways have two figures in the integral part of the number, but the eleventh expression has only one figure there.
Can you find all the eleven expressions?View SolutionSubmit Solution 801.1K views
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There is a number which is very peculiar. This number is three times the sum of its digits. Can you find the number
View SolutionSubmit Solution 799.4K views
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My friend Asha was throwing a very grand party and wanted to borrow from me 100 wine glasses. I decided to send them through my boy servant Harish.
Just to give an incentive to Harish to deliver the glasses intact I offered him 3 paise for every glass delivered safely and threatened to forefeit 9 paise for«very glass he broke.
On settlement Harish received Rs 2.40 from me. How many glasses did Harish break?View SolutionSubmit Solution 801.0K views
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A wholesale merchant came to me one day and posed this problem. Every day in his business he has to weigh amounts from one pound to one hundred and twentyone pounds, to the nearest pound. To do this, what is the minimum number of weights he needs and how heavy should each weight be?
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Recently I attended the twelfth wedding anniversary celebrations of my good friends Mohini and Jayant. Beaming with pride Jayant looked at his wife and commented, ‘At the time we were married Mohini was 3/4 of my age, but now she is only 5/6 th.
We began to wonder how old the couple must have been each at the time of their marriage!
Can you figure it out?View SolutionSubmit Solution 805.4K views
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Last time I visited a friend’s farm near Bangalore he gave me a bag containing 1000 peanuts. From this I took out 230 peanuts for use in my own home and gave away the bag with the remainder of peanuts to three little brothers who live in my neighbourhood and told them to distribute the nuts between themselves in proportion to their ages which together amounted to 17.5 years.
Tinku, Rinku and Jojo, the three brothers, divided the nuts in the following manner:
As often as Tinku took four Rinku took three and as often as Tinku took six Jojo took seven.
With this data can you find out what were the respective ages of the boys and how many nuts each got?View SolutionSubmit Solution 799.0K views
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Which would you say is heavier, a pound of cotton or a pound of gold?
View SolutionSubmit Solution 799.7K views
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While walking down the street, one morning, I found a hundred rupee note on the footpath. I picked it up, noted the number and took it home.
In the afternoon the plumber called on me to collect his bill. As I had no other money at home, I settled his account with the hundred rupee note I had found. Later I came to know that the plumber paid the note to his milkman to settle his monthly account, who paid it to his tailor for the garments he had had made.
The tailor in turn used the money to buy an old sewing machine, from a woman who lives in my neighbourhood. This woman incidentally, had borrowed a hundred rupees from me sometime back to buy a pressure cooker. She, remembering that she owed me a hundred rupees, came and paid the debt.
I recognised the note as the one I had found on the footpath, and on careful examination I discovered that the bill was counterfeit.
How much was lost in the whole transaction and by whom?View SolutionSubmit Solution 799.1K views
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