New post in Recreational-mathematics

What is the first 21 digit prime in consecutive digits of $e$?

August 24th, 2022

Find a quadratic polynomial which when divided by (x-1), (x-2), (x-3) leaves remainders 11, 22, 37 respectively.

August 18th, 2022

The hands of a clock are observed continuously from 12:45 pm onwards. They will be observed to point in the same direction some time between

August 15th, 2022

Catherine is now twice as old as Jason but 6 years ago she was 5 times as old as he was. How old is Catherine now?

November 6th, 2022

9 hens lay 9 eggs in 9 days...

October 3rd, 2022

How many minimum weights do you need to measure all weights from $1$kg to $1000$kg

July 9th, 2020

There are two buckets A and B.

August 1st, 2022

Longest distance between 2 points on a cylinder

October 17th, 2020

Find Volume of a Wineglass - a Slice

August 1st, 2022

Striking off a digit from each of the numbers written in seven rows, while preserving arithmetical operations

February 20th, 2020

What is the subset of the letters in the word 'numbers'

August 1st, 2022

Is my solution of this time and distance problem correct or wrong?

August 1st, 2022

How to show that a relation is an equivalence relation given a defined relation

August 1st, 2022

How can I find the value of y given x using matlab / octave

August 7th, 2020

Proving that a regular polygon with infinite sides is a circle by using limits on the formula $\frac{\pi}{n}(n-2)$

May 2nd, 2020

Is there a list of the number of sets of consecutive integers that sum to n?

December 11th, 2021

Conversion of Excel formula back to written Formula...if possible!

July 27th, 2020

Units of Hamming, and Euclidean distance

August 1st, 2022

Formula for sequences

August 1st, 2022

How do you find the altitude in a pyramid? (SAT math question)

August 1st, 2022

hitting a dart board probability

May 21st, 2020

how to prove that $x^2 + y^2 =1$ is injective and surjective depending on the restrictions?

March 11th, 2020

How to prove intersections and subsets of sets

August 1st, 2022

Is the rotation in 2D done by vector addition, project, or rotation?

March 17th, 2020

Calculating the length of tape when it is wound up

February 16th, 2020

Cut the letter $M$ to obtain $9$ single triangles by drawing $3$ straight lines

August 1st, 2022

Subtraction of numbers with arbitrary bases

August 1st, 2022

Can this crate have even numbers in all rows and columns?

August 1st, 2022

Hands of a clock forming certain angles

August 1st, 2022

How to verify method used to solve integral was actually the fastest?

March 28th, 2020