[S3 Maths and Up: Trigonometry] Not exactly the shortest short path problem, but definitely a short shortest path problem. Kept you...

[All levels - Logic] Would you happen to know what a contradiction is? Are you comfortable with contradictions? I certainly am not. They...

[S3 and up Social Studies: Jakarta] The title is supposed to be a joke on how there was a movie called Japan Sinks, though I would guess...

[Sec 1 Maths - Prime Numbers]: Prime numbers are numbers that have only 2 factors, the number itself and 1 i.e. they are only divisible...

[S2 Maths: Pythagoras' Theorem] Hey, it's been a while. So, you have probably heard about Pythagoras' Theorem, and what it is: namely,...

[P4 Science and up: Magnetism] It frankly never occurred to me, and like many other people, that this was a thing. The case is not...

[S1 Science & Maths: Reflection (and property of ellipses)] You may have found a puzzle like this while digging around older newspaper...

[S1 Science: Magnetism] How do you think the ballerina spins? It's pretty deceptive, hiding a magnet behind the mirror like that. And...