Difficulty Popularity

I bought three toys for my triplet boys (one for each). I placed the toys in the dark store. One by one each boy went to the store and pick the toy. What is the probability that no boy will choose his own toy?

Difficulty Popularity

You have ten boxes and an electronic weighing machine. In those ten boxes, you have chocolates. Each chocolate weigh 20 grams. But in one box the chocolates are defective and each weigh 19 grams exactly.

Now you can weigh in the electronic weighing machine but you can use that machine just once. How will you find out which box has the defected chocolates.

Now you can weigh in the electronic weighing machine but you can use that machine just once. How will you find out which box has the defected chocolates.

Difficulty Popularity

You live in Dubai and had an infinite supply of oil and a 5 liters and 3 liters jar,

how would you measure exactly 4 liters (of-course in minimum numbers of step) ?

how would you measure exactly 4 liters (of-course in minimum numbers of step) ?

Difficulty Popularity

In a closed jar, there are three strawberry candies, two mango candies and five pineapple candies. You can't see inside the jar. Now, how many toffees you must take out from the jar to make sure that you have one of each flavor?

Difficulty Popularity

Right across the street is a fast food outlet that sells chicken in the order of 6, 9 and 20 only.

Determine the maximum number of chicken pieces that cannot be ordered from the outlet?

Determine the maximum number of chicken pieces that cannot be ordered from the outlet?

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