Understanding Narcissistic Numbers

The video tutorial introduces the concept of narcissistic numbers, focusing on the number 153. Ria Symonds explains how 153 is a narcissistic number by demonstrating the calculation of its digits raised to the power of three, which sums back to 153. She also provides an example of a four-digit narcissistic number, 8208, and explains the process of calculating it. The discussion concludes with a note on the fun aspect of these numbers and their mathematical limits, mentioning that there are 88 known narcissistic numbers, with the largest having 39 digits.

What is a narcissistic number?

• A number that is divisible by itself

• A number that is a perfect square

• A number that equals the sum of its digits each raised to the power of the number of digits

• A number that is prime

Why is the number 153 considered special?

• It is a perfect square

• It is a Fibonacci number

• It is a prime number

• It is a narcissistic number

How do you calculate if 153 is a narcissistic number?

• Divide the number by the sum of its digits

• Add the digits together

• Multiply the digits together

• Raise each digit to the power of 3 and sum them

What is the result of 5 cubed?

• 15

• 25

• 125

• 225

What is the four-digit narcissistic number mentioned in the video?

• 9474

• 8208

• 1634

• 9475

How do you verify if 8208 is a narcissistic number?

• Add the digits together

• Raise each digit to the power of 4 and sum them

• Multiply the digits together

• Divide the number by the sum of its digits

How many narcissistic numbers are there?

• 39

• 50

• 100

• 88

What is the maximum number of digits a narcissistic number can have?

• 100

• 50

• 39

• 20

What is the significance of narcissistic numbers in mathematics?

• They are essential for solving equations

• They are a fun mathematical curiosity

• They are used in geometry

• They are used in calculus

What is the largest narcissistic number known?

• A number with 20 digits

• A number with 39 digits

• A number with 50 digits

• A number with 100 digits