This seemingly simple math problem stumped1500,000 people. This question attracted more than 3.42 million global netizens to answer on Facebook. Results More than 6.5438+0.92 million people answered correctly and 6.5438+0.49 million people answered incorrectly. Many students answered 9 and many students answered 1. There are many other answers, so what is it? What do you think is the correct answer?

The answer is revealed-the correct answer is 9. But strictly speaking,

This topic is not rigorous enough, which means it is wrong!

"This is not a mathematical problem, because it can't even make people understand what its standard expression is."

"When people disagree about the meaning of the question itself, it successfully becomes a language understanding problem."

The reporter consulted Zhang Yuzhen, the headmaster of Nanchang Road Primary School and a fifth-grade math teacher. After analyzing the problem, he thought it was wrong.

"There is a rule in the fourth grade mathematics of our primary school that the multiplication sign of the operation symbol can be omitted between letters and numbers, for example, 2A equals 2×A, but not between numbers, for example, 2×2, not 22." Teacher Zhang thinks that "2( 1+2)" in this question can't omit the multiplication sign, and () only represents the sum of two numbers in "1+2" and can't represent the relationship with the previous number. "The topic itself is not standardized. Mathematically speaking, the topic is wrong. "

The reporter interviewed Guo Qijun, the headmaster of Ninghai Middle School, a special math teacher in Jiangsu Province, and the first batch of senior middle school teachers at the professor level in Jiangsu Province. President Guo carefully read the topic and said:

"Lack of symbolic connection, the topic is wrong." President Guo said that the mathematical formula of middle school mathematics is not as strict as that of primary school. The single formula "2( 1+2)" is effective and will not cause differences, and the multiplication sign in the middle can be omitted. "This' 6 ÷ 2 (1+2) =? "The key issue that has caused so much controversy is the lack of symbolic connections in complex formulas, which leads to many possible differences in formulas. This formula is not rigorous and standardized. If the answer is' 9', then the correct formula is' (6 ÷ 2) × (1+2) =' If the answer is' 1', then the correct formula is' 6 ÷ [2× (1+2)] =?? . "