COO Jeff Zwelling turns to unique interview questions to get to know job candidates better. Here's one simple, yet tricky, math query he often asks.

Memorising key square roots and using mental math tricks saves time. Techniques like the nearby perfect square trick and weighted averaging enhance problem-solving skills.

CEO Jeff Zwelling turns to unique interview questions to get to know job candidates better. Here's one simple, yet tricky, math query he often asks.