## What is the 5th perfect number?

List of perfect numbers

Rank | p | Perfect number |
---|---|---|

5 | 13 | 33550336 |

6 | 17 | 8589869056 |

7 | 19 | 137438691328 |

8 | 31 | 2305843008139952128 |

### What are the first 10 perfect numbers?

It is known that all even perfect numbers (except 6) end in 16, 28, 36, 56, 76, or 96 (Lucas 1891) and have digital root 1. In particular, the last digits of the first few perfect numbers are 6, 8, 6, 8, 6, 6, 8, 8, 6, 6, 8, 8, 6, 8, 8.

#### Why is 28 called a perfect number?

A number is perfect if all of its factors, including 1 but excluding itself, perfectly add up to the number you began with. 6, for example, is perfect, because its factors — 3, 2, and 1 — all sum up to 6. 28 is perfect too: 14, 7, 4, 2, and 1 add up to 28.

**What are the first 3 perfect numbers?**

The smallest perfect number is 6, which is the sum of 1, 2, and 3. Other perfect numbers are 28, 496, and 8,128.

**Why is 10 not a perfect number?**

Note that 10 is not an aliquot part of 10 since it is not a proper quotient, i.e. a quotient different from the number itself. A perfect number is defined to be one which is equal to the sum of its aliquot parts.

## Is 27 a perfect number?

Perfect number, a positive integer that is equal to the sum of its proper divisors. The smallest perfect number is 6, which is the sum of 1, 2, and 3. Other perfect numbers are 28, 496, and 8,128.

### Why is 24 a perfect number?

The only even perfect number of the form x3 + 1 is 24. 24 is also the only even perfect number that is a sum of two positive cubes of integers. The number of divisors of a perfect number (whether even or odd) must be even, because N cannot be a perfect square.

#### When to use the Korean form for numbers?

Use the Korean form for numbers of items (between 1 and 99) and age, e.g. 2 children, 5 bottles of beer, 27 years old. Ending consonants are not aspirated, meaning there is no ending breath at the end of the syllable. Here’s how to count to ten in the Korean form : One = 하나 pronounced “hana”

**How many Hanja letters are there in Korean?**

However, if you include 16 diphthongs and double consonants, there are 40 letters in total. Korean also uses around 3,000 Chinese characters, or Hanja, to represent words of Chinese origin.

**How tall is Yujin from K-pop in feet?**

Yujin was listed at 42.05 kg (92.7 pounds) and 162.1 cm (5 feet, 3.8 inches). While her profile height listed her at 164 cm (5 feet 4.56 inches), the difference may have been a blessing in disguise, as her real height is a perfect match of the ideal Korean body type!

## How many letters are there in Korean Hangeul?

Hangeul has 24 letters, consisting of 14 consonants and 10 vowels. However, if you include 16 diphthongs and double consonants, there are 40 letters in total. Korean also uses around 3,000 Chinese characters, or Hanja, to represent words of Chinese origin.