Unexpected attention from the Internet users attracted recently published on the social network Facebook is a simple task, in which there are four fundamental arithmetic operations — addition, subtraction, multiplication and division.
The objective is formulated as follows:
The message in the social network has already collected several thousand “likes” and comments and more than 500 reposts. The most popular answers were “1” and “7”, although some people offer and other numbers. Problem authors note that the first option you can get if you try to solve an example on the old calculator, second — if to try to enter the example into any of the designated popular Internet services.
Unlike some similar problems, causing an intense discussion of Internet users earlier, this example, by and large, does not contain any dirty tricks. The only thing that should be taken into account in its decision is the procedure. When solving any math problems you must first perform the operations in parentheses, then multiplication and division, and lastly addition and subtraction. As in the above problem there are no parentheses, it is necessary first of all to multiply 1 to 0 (received 0) 2 and divide by 2 (getting 1). The resulting example 6-0+1 shows that the correct answer is 7. Obviously, those who in the comments to the question was another popular answer, 1 consistently completed all steps from left to right, that is a mistake.