Question

Four friends A, B, C and D need to cross a bridge. A maximum of two persons can cross it at a time. It is night and they just have one lamp

Answer 1

Answer:

Step-by-step explanation:

First A and B will cross the bridge then B will take lamp with him and return then B andC will cross the bridge and C will take the lamp and return towards D and then C and D will cross the bridge.