Question

An inventor asked for one grain of wheat for the first square on the chessboard, 2 for the second, four for the third and so on... How many would he have asked for the 20th square?

Answer 1

Answer:

524288

Step-by-step explanation:

• on the first step he (inventor)asks for 1 grain of wheat(2^0)
• after that he asked for 2 grains (2^1)
• after that he asked for four grains (2^2)
• after that he would asked for 8 grains (2^3)
• this would go on for the 20th step which is 2^19 which is 524288