IQ tests are commonly used to identify individuals with exceptional abilities or learning difficulties. They can aid in determining a person's intellectual potential and help guide their educational path. Additionally, these tests can assist in evaluating learning disorders such as dyslexia or ADHD, allowing for appropriate treatment plans. While IQ tests have their benefits, they also have limitations. Factors like anxiety or fatigue can affect test scores, and they do not measure practical skills or social competencies crucial to success in life.

## A Mathematical Puzzle Stirring Debate

A recent equation has sparked controversy on the internet. The equation in question is:

6 – 1 × 0 + 2 ÷ 2 = ?

Users online have differing opinions on the correct answer, with some arguing for 7 and others convinced it is 1. To find the truth, let's examine the equation and its solution further.

## The Importance of the Order of Operations

The order of operations is a set of rules that determine the sequence in which operations should be performed in an equation. These rules are critical because different sequences can yield entirely different results. To prevent confusion, it is essential to follow standardized rules, similar to following game rules or the grammar of a language. One common acronym used to remember the order is PEMDAS:

P: Parentheses

E: Exponents

M/D: Multiplication and Division

A/S: Addition and Subtraction

It is also crucial to solve equations from left to right.

## Applying the Order of Operations to the Equation

Let's apply the PEMDAS rule to our equation: 6 – 1 × 0 + 2 ÷ 2 = ? Since there are no parentheses or exponents, we start with multiplication and division:

1 × 0 = 0

2 ÷ 2 = 1

Then, we move on to addition and subtraction from left to right, which results in 7:

6 – 0 + 1 = 7

## Understanding the “1” Answer

Despite correctly applying the order of operations, some still claim that the answer is 1. How is this possible? The answer lies in how older calculators used to handle equations.

In the past, calculators were less sophisticated and did not consider the order of operations. They simply performed calculations in the order they were entered. Therefore, if you input 6 – 1 × 0 + 2 ÷ 2 = from left to right on an older calculator, you would get 1 as the answer.

## The Significance of Knowing the Order of Operations

Understanding and applying the order of operations is crucial for correctly solving mathematical equations. Presh Talwalkar, a mathematician who runs the YouTube channel Mind Your Decisions, emphasizes the importance of knowing PEMDAS. In Canada, for example, solving equations similar to this puzzle is necessary to have a chance at winning the lottery or contests.

## Reactions from Internet Users

Mr. Talwalkar's video on the equation sparked numerous comments from internet users who solved the equation differently. Some shared their initial answer of 1 before remembering PEMDAS and arriving at 7.

Others pointed out the consequences of ignoring the order of operations, mentioning past experiences in third-grade math class.

Many internet users also discussed the challenges posed by older calculators, which required mindful consideration of the order of operations to arrive at the correct answer.

In conclusion, the correct answer to the equation is 7 when the order of operations is respected. However, it is essential to understand and apply the order to accurately solve mathematical equations.