Every day, I see people online and on social media DIYing everything — their furniture, their home renovations, even their own wedding cakes — and they make it look so effortless and easy. But is it?

The teaser presents a series of unusual multiplication problems: "5 x 3 = 51, 5 x 5 = 52, 5 x 4 = 02, 5 x 6 = ??". This ...