# What is meant by Adam Number?

**Adam Number**.

**Adam number**is a

**number**when reversed, the square of the

**number**and the square of the reversed

**number**should be

**numbers**which are reverse of each other.

**Adam numbers**upto 1000 are: 0, 1, 2, 3, 11, 12, 13, 21, 22, 31, 101, 102, 103, 111, 112 , 113, 121, 122, 201, 202, 211, 212, 221, 301, 311.

A.

### What is the perfect number?

In

**number**theory, a**perfect number**is a positive integer that is equal to the sum of its proper positive divisors, that is, the sum of its positive divisors excluding the**number**itself (also known as its aliquot sum).#### What are the first 5 perfect numbers?

List of perfect numbersRank p Perfect number 2 3 28 3 5 496 4 7 8128 5 13 33550336 #### Is there a perfect square for 18?

Is**18 a perfect square**number? A number is a**perfect square**(or a**square**number) if its**square**root is an integer; that is to say, it is the product of an integer with itself. Here, the**square**root of**18**is about 4.243. Thus, the**square**root of**18**is not an integer, and therefore**18**is not a**square**number.#### What is an abundant number?

In**number**theory, an**abundant number**or excessive**number**is a**number**for which the sum of its proper divisors is greater than the**number**itself. The integer 12 is the first**abundant number**. Its proper divisors are 1, 2, 3, 4 and 6 for a total of 16.

B.

### What is a happy number?

**Happy number**. A

**happy number**is defined by the following process: Starting with any positive integer, replace the

**number**by the sum of the squares of its digits in base-ten, and repeat the process until the

**number**either equals 1 (where it will stay), or it loops endlessly in a cycle that does not include 1.

#### What is the happiest number?

What is the happiest number between 1 and**1,000,000**. I define the happiest number as the smallest number that finds the most other happy numbers with it, i.e. 7 found**four**other numbers (49, 97, 130, and 10) making it a rank**4**in happiness.#### What is a happy number example?

**Happy Number**. Let the sum of the squares of the digits of a positive integer be represented by . If for some , then the original integer is said to be**happy**. For**example**, starting with 7 gives the sequence 7, 49, 97, 130, 10, 1, so 7 is a**happy number**.#### What is a good luck number?

**Here's a list of lucky and unlucky Chinese numbers!**- 2 (?, ÈR) - LUCKY. The Chinese believe that doubles bring blessings.
- 3 (?, SĀN) - LUCKY.
- 4 (?, SÌ) - UNLUCKY.
- 5 (?, WǓ) - LUCKY/UNLUCKY.
- 6 (?, LIÙ) - LUCKY.
- 7 ?, QĪ- LUCKY/UNLUCKY.
- 8 (?, BĀ) - LUCKY.
- 9 (?, JIǓ) - LUCKY.

C.

### What are the Armstrong numbers?

An

**Armstrong number**of three digits is an integer such that the sum of the cubes of its digits is equal to the**number**itself. For example, 371 is an**Armstrong number**since 3**3 + 7**3 + 1**3 = 371. Write a program to find all**Armstrong number**in the range of 0 and 999.#### What is a Armstrong number in C++?

**C++**Program to check**Armstrong Number**. By Chaitanya Singh | Filed Under:**C++**Programs. An integer**number**is called**Armstrong number**if sum of the cubes of its digits is equal to the**number**itself. For example: 370 is an**armstrong number**because: 370 = 3*3*3 + 7*7*7 + 0*0*0 = 27 + 343 + 0 = 370.#### What is meant by neon number?

A**neon number**is a**number**where the sum of digits of square of the**number**is equal to the**number**. For example if the input**number**is 9, its square is 9*9 = 81 and sum of the digits is 9. i.e. 9 is a**neon number**. C program to check a**number**is a**neon number**or not.#### What is a perfect number in C?

This**C**Program checks whether a given**number**is**perfect number**.**Perfect number**is a**number**which is equal to sum of its divisor. For eg,divisors of 6 are 1,2 and 3. The sum of these divisors is 6. The**C**program is successfully compiled and run on a Linux system.

Updated: 3rd October 2019