You want to boil an egg for exactly 15 minutes but you only own a 7-minute hourglass and an 11-minute hourglass.
How can you achieve what you want?
Weekly Riddle: May 4-8
You live in a place where six months of the year is mild summer and during the other six months the mercury goes drastically down! You own a lake where there is a small island. You want to build a house over there and need to get some materials across there. You have no boat, plane or anything which you can use to transport them to the island. How will you solve the problem?