Cube of 521

A cube number is a value obtained by raising a number to the power of 3, or by multiplying the number by itself three times. When you cube a positive number, the result is always positive. When you cube a negative number, the result is always negative. This is because a negative number by itself three times results in a negative number. The cube of 521 can be written as 521³, which is the exponential form. Or it can also be written in arithmetic form as, 521 × 521 × 521.

In order to check whether a number is a cube number or not, we can use the following three methods, such as multiplication method, a factor formula (a³), or by using a calculator. These three methods will help kids to cube the numbers faster and easier without feeling confused or stuck while evaluating the answers.

• By Multiplication Method
   
• Using a Formula
   
• Using a Calculator

The multiplication method is a process in mathematics used to find the product of two numbers or quantities by combining them through repeated addition. It is a fundamental operation that forms the basis for more complex mathematical concepts.

Step 1: Write down the cube of the given number.

521³ = 521 × 521 × 521

Step 2: You get 141,984,641 as the answer.

Hence, the cube of 521 is 141,984,641.

The formula (a + b)³ is a binomial formula for finding the cube of a number. The formula is expanded as a³ + 3a²b + 3ab² + b³.

Step 1: Split the number 521 into two parts, as 500 and 21.

Let a = 500 and b = 21, so a + b = 521

Step 2: Now, apply the formula (a + b)³ = a³ + 3a²b + 3ab² + b³

Step 3: Calculate each term a³ = 500³ , 3a²b = 3 × 500² × 21 , 3ab² = 3 × 500 × 21² ,  b³ = 21³

Step 4: Add all the terms together: (a + b)³ = a³ + 3a²b + 3ab² + b³ (500 + 21)³

= 500³ + 3 × 500² × 21 + 3 × 500 × 21² + 21³ 521³

= 125,000,000 + 15,750,000 + 661,500 + 9,261 521³

= 141,984,761

Step 5: Hence, the cube of 521 is 141,984,761.

To find the cube of 521 using a calculator, input the number 521 and use the cube function (if available) or multiply 521 × 521 × 521. This operation calculates the value of 521³, resulting in 141,984,761. It’s a quick way to determine the cube without manual computation.

Step 1: Ensure the calculator is functioning properly.

Step 2: Press 5, 2, and 1

Step 3: If the calculator has a cube function, press it to calculate 521³.

Step 4: If there is no cube function on the calculator, simply multiply 521 three times manually.

Step 5: The calculator will display 141,984,761.

The cube of any even number is always even, while the cube of any odd number is always odd. The product of two or more perfect cube numbers is always a perfect cube. A perfect cube can always be expressed as the product of three identical groups of equal prime factors.

• Binomial Formula: It is an algebraic expression used to expand the powers of a number, written as (a + b)ⁿ, where ‘n’ is a positive integer raised to the base. The formula is used to find the square and cube of a number.
  
   
• Cube of a Number: Multiplying a number by itself three times is called the cube of a number.
  
   
• Exponential Form: It is a way of expressing numbers using a base and an exponent (or power), where the exponent value indicates how many times the base is multiplied by itself. For example, 2³ represents 2 × 2 × 2 equals 8.
  
   
• Perfect Cube: A number that can be expressed as the product of three identical integers, such as 8, 27, or 64.
  
   
• Cube Root: The cube root of a number x is a number y such that y³ = x. The cube root of a number can be approximated using a calculator.