A problem puzzled the users of the network

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A Twitter user under the nickname kj_cheetham told people about the problem, which he called “meme in mathematics.” Users in the comments were confused by the example and found that he made a mistake in calculations.

“Meme math which is really funny and not stupid. Decide carefully!” — he wrote. The task was to calculate the 230-220×0,5 and write the answer. “You may not believe it, but the answer is 5!” — added the user.

However, in the comments, many began to criticize the man, thinking that he was wrong — the correct answer is 120. Individual users have pointed out to him that first performs multiplication, and then subtraction. Someone began to explain that the answer 5 can be obtained only with the use of parentheses.

However, some users guessed what the answer meant kj_cheetham — he pointed out not 5, and 5!, that is the factorial. The factorial is a function which is defined as the product of all natural numbers from 1 to n, inclusive. In this case, n is 5. Later in the discussion with one of the commentators he painted, is the function in this example: 5!=5x4x3x2x1=120.

“I’ll turn off my notifications to this thread, but please remember that you should think twice before you say that someone does not know something based on one tweet,” concluded kj_cheetham.

Earlier, another Twitter user asked a question on mathematics of primary school. He received one answer, but different solutions. In the comments were surprised that not all are equally suited to solving the same problem.

Video, photo All from Russia.

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