Fresh Puzzle for the day - Egg Puzzle
You have to tell the minimum no. of ways in which you can find out that floor from which the egg starts breaking on hitting the ground.
Remember that you have only 2 eggs for doing this task.
Member • Sep 23, 2011
Since there is a lowest floor out of the hundred from where the the egg starts breaking. start with floor 1 and go on dropping the same egg from all odd numbered floors. The egg can be reused till it breaks. Let us say that you find a break at (2n + 3)rd floor and not at (2n + 1) (n varying from 0 to 49). Drop the second egg from (2n + 2)th floor. If this also breaks (2n + 2)th floor is the answer. Otherwise (2n + 3) is the answer.FrootyA building of 100 floors is present. You have only 2 artificial eggs made up of plastics with you. There is a one floor on the building from which this egg will break if released.It is understood that if egg is released from the floor higher than that floor then also egg will break on striking the ground.
You have to tell the minimum no. of ways in which you can find out that floor from which the egg starts breaking on hitting the ground.
Remember that you have only 2 eggs for doing this task.
Member • Sep 24, 2011
Bonus: All the climbing up and down will shed unwanted pounds.Can we also not have real Eggs and I utilize it better than finding how it might not break. I rather have them in my body to get the energy to ride those 100 floor! if I ever can! Jokes apart, must admire Mr. Bioramani for the answer.
Member • Sep 24, 2011
Member • Sep 24, 2011
Member • Sep 25, 2011
Member • Sep 25, 2011
I don't get this line. Can you explain what this line means?FrootyWe know that sum of the first 'n' natural no. cannot be less than the no. of floors given. But the sum could be greater or equal to the no. of floors.
Member • Sep 25, 2011
Something does not gel in this. Incidentally the mathematics of the above is not rigorous.FrootyHere is the mathematical explanation for the answer.
We have 100 floors.
Also sum of the first 'n' natural no. = n(n+1)/2
We know that sum of the first 'n' natural no. cannot be less than the no. of floors given. But the sum could be greater or equal to the no. of floors. So, we have
n(n+1)/2>_ 100 { >_ represents greater or equal to}
Aslo,n(n+1) >_200 > 182
{Inequality remains same as 200 > 182.We took 182 because it is the nearest multiple of 2 natural numbers}
Thus, n^2+n-182 >0
So, (n+14)(n-13)>0
or, n> -14, 13
We know that n should not be negative as no. of trials can't be negative.
As, n>13
Hence, n=14