1 answer published. Last candidate submission on Jul 30 2026, 11:50am PDT. Interview question asked to Product Managers interviewing at Headspace, Bunq, Sendbird and other companies. Original question asked: What is a complex technical concept you’ve recently learned for fun? Explain it to a 10-year-old.. Question last reported by a candidate interviewing at Ant Financial for a Product Manager interview on Aug 25 2026, 8:23pm PDT.