## 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…

## Problem of the Week (19)

A bus in Springfield has a maximum capacity of 40 passengers. The bus begins its route with . At the…

## Problem of the Week (18)

Let n be the smallest positive integer with exactly 2015 positive factors. What is the sum of the (not necessarily distinct) prime…

## Problem of the Week (17)

Triangle ABC has AB = AC. Point D is on side BC so that AD = CD and ∠BAD = 36. Find the degree measure of ∠BAC. Source: Purple Comet, 2017 Happy problem solving! Email your…

## Problem of the Week (11)

Solve the following equation: Happy problem solving! Email your solutions to [email protected]

## Problem of the Week (10)

You have ten bags – each bag has ten coins (weighing 1g each), however, one bag contains fake coins (weighing…

## Problem of the Week (7)

A monk climbs a mountain. He starts at 8AM and reaches the summit at noon. He spends the night on…

## The Trivial Inequality

One of the most fundamental inequalities in math is the Trivial Inequality, which says: If x is a real number,…

### Personal

### Categories

- Engineering (6)
- Enrichment (3)
- Essays (5)
- General (5)
- Interviews (7)
- Maths (15)
- Problem of the Week (28)
- Science (44)
- Sustainability (7)
- Technology (19)