A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?
I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?
The centre of the third figure is empty. What digit should fit inside?
