Problem of the Week (27)
A logician vacationing in the South Seas finds himself on an island inhabited by the two proverbial tribes of liars…
Problem of the Week (26)
Donald draws ten mathematical objects that can be labelled from . He puts them into a natural sequence as follows:…
Mathematical Proof
Title image: Euclid’s Elements Proving various results in math is arguably one of the most rewarding parts of doing it….
Problem of the Week (25)
What is the hundreds digit of ? Source: 2019 AMC 10A Happy problem solving! Email your solutions to [email protected]
Problem of the Week (24)
Compute the least positive integer for which and are prime but and are composite. Source: ARML Local 2020 Happy problem…
Problem of the Week (23)
Emilia wishes to create a basic solution with 7% hydroxide (OH) ions. She has three solutions of different bases available:…
Problem of the Week (22)
Find the number of real numbers that satisfy the equation: Happy problem solving! Email your solutions to [email protected]
Problem of the Week (21)
A triangle has sides of length 10, 10, and 12. A rectangle has width 4 and the same area as…
Problem of the Week (20)
What is to 3 s.f.? (you may find technology rather helpful) Source: Ritangle 2019 Happy problem solving! Email your solutions…
The Monty Hall Problem
Probability can be a tricky devil when it comes to intuition. It can fool you just like how you see what isn’t there in…