Fifty minutes ago it was four times as many minutes past three o’clock. How many minutes is it to six o’clock..? I have got the solution online but have doubts in it : There are 180 minutes between 3 o’clock and 6 o’clock. Call x the number of minutes to 6 o’clock. Then it is […]

I found a maths puzzle somewhere and a part of it as below: Kelly wants to place n objects $a_1 , a_2 , ··· , a_n$ into $k > 1$ bags. For each $i = 1 , 2 , ··· , n $, the weight of $a_i$ is $w_i$ kilograms. The capacity of each bag […]

Sent to me by a friend, I’m stumped. We have an urn. It is first filled with balls of $C$ different colors, ${N_1,N_2,…N_c}$ of each of the colors. Lastly, a ball with a distinct marking is added. We are not given $C$ or any of the $N$ values. A machine removes the balls without replacement […]

I am trying to improve my logical reasoning skills. Came across below question. See image. Can anybody let me know what the logical reasoning to the answer will be. I have no idea how to solve this The question is, “Which of diagrams A, B, C, D, or E is the best continuation of the […]

Two people play a mathematical game. Each person chooses a number between 1 and 100 inclusive, with both numbers revealed at the same time. The person who has a smaller number will keep their number value while the person who has a larger number will halve their number value. Disregard any draws. For example, if […]

A square $666\times666$ has been covered using tiles $5\times1$. A single square $1\times 1$ hasn’t been covered. Find in how many places the not covered square can be.

What is the expected value of the absolute difference between 2 N faced dice? What about the difference between 2 dice one with N faces and one with M faces? While finding the expected value of 2 random variable sums or differences are simple enough, how do you deal with absolute value of differences? Thanks

I am in need of a more generalized solution to this problem. I have a random number generator that generates numbers from 0 to 1. Using this, I want to find $r$ numbers that add to $n$. How do I do this efficiently, and such that the numbers are uniformly distributed? For my specific case, […]

Suppose I click a random tile during a Minesweeper game. It is a 1. During each time I click an adjacent square, what are the chances of hitting a mine? How would this change if it were a 2 or another number?

Is it possible to decompose a circle into finitely many similar disjoint pieces, one of which contains the circle’s center in its interior?

Intereting Posts

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Ideal and minimal polynomial
A circle with infinite radius is a line
What is $f(f^{-1}(A))$?
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Find the quadratic sub field of $\mathbb Q(\zeta_7)$ which can be expressed in the form $\mathbb Q(\sqrt D)$,where $D$ is an integer.
CRC computation
Image of Möbius transformation
A Turing machine for which halting is outside ZFC
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Show that a vector that is orthogonal to every other vector is the zero vector