# How many hex digits are required to represent decimal numbers up to 20 000?

So,

**3 hex digits**are not enough to represent the decimal numbers up to 20,000. The largest decimal value that can be represented by a 4-bit hex number is, Therefore, the number of hex digits required to represent decimal numbers up to 20,000 is .A.

### What is the decimal number 15 in hex?

Hexadecimal Numbers

Decimal Number | 4-bit Binary Number | Hexadecimal Number |
---|---|---|

13 | 1101 | D |

14 | 1110 | E |

15 | 1111 | F |

16 | 0001 0000 | 10 (1+0) |

#### How does hex work?

In mathematics and computing,**hexadecimal**(also base 16, or**hex**) is a positional numeral system with a radix, or base, of 16. It uses sixteen distinct symbols, most often the symbols 0–9 to represent values zero to nine, and A–F (or alternatively a–f) to represent values ten to fifteen.#### What is a hexadecimal number?

The**hexadecimal numbers**are 0-9 and then use the letters A-F. We show the equivalence of binary, decimal, and**hexadecimal numbers**in the table below.**Hexadecimal**is a convenient way to express binary**numbers**in modern computers in which a byte is almost always**defined**as containing eight binary digits.#### How much do coders make?

Because of the high demand for coders, wages for new medical coders grow year after year. The latest reports from the Bureau of Labor Statistics shows that, on average, a medical coder makes**$16.42**an hour for an annual salary of**$34,160**, with variations based on location.

B.

### What is the 0x in hex?

It's a prefix to indicate the number is in

**hexadecimal**rather than in some other base. The C programming language uses it to tell compiler. Example : 0x6400 translates to 6*16^3 + 4*16^2 + 0*16^1 +0*16^0 = 25600. When compiler reads 0x6400 , It understands the number is**hexadecimal**with the help of**0x**term.#### What is a string in Swift?

A**string**is a series of characters, such as "hello, world" or "albatross" .**Swift strings**are represented by the**String**type. The contents of a**String**can be accessed in various ways, including as a collection of Character values.#### What is an optional in Swift?

**Optionals**say either "there is a value, and it equals x" or "there isn't a value at all". An**Optional**is a type on its own, actually one of**Swift**4's new super-powered enums.**Optionals**are similar to using nil with pointers in Objective-C, but they work for any type, not just classes.#### What is optional binding?

**Optional Binding**. Other than forced unwrapping,**optional binding**is a simpler and recommended way to unwrap an**optional**. You use**optional binding**to check if the**optional**contains a value or not. If it does contain a value, unwrap it and put it into a temporary constant or variable.

C.

### How many hexadecimal digits are in a binary digit?

This means that each digit in hexadecimal is the same as

**four digits**in binary. Octal uses a three-bit binary system. In the decimal system, the first digit is the one's place, the next digit to the left is the ten's place, the next is the hundred's place, etc. In hexadecimal, each digit can be**16**values, not 10.#### How does hex work?

In mathematics and computing,**hexadecimal**(also base 16, or**hex**) is a positional numeral system with a radix, or base, of 16. It uses sixteen distinct symbols, most often the symbols 0–9 to represent values zero to nine, and A–F (or alternatively a–f) to represent values ten to fifteen.#### What is the name of a single binary digit?

A bit (short for**binary digit**) is the smallest unit of data in a computer. A bit has a**single binary**value, either 0 or 1. Half a byte (four bits) is**called**a nibble.#### What is the use of binary numbers in computers?

A**binary**code represents text,**computer**processor instructions, or any other data using a two-symbol system. The two-symbol system**used**is often the**binary**number system's 0 and 1. The**binary**code assigns a pattern of**binary**digits, also known as bits, to each character, instruction, etc.

Updated: 3rd December 2019