101 (number) facts for kids

101 is a number that comes right after 100 and just before 102. It's a special kind of number called a prime number. This means 101 can only be divided evenly by 1 and itself.

Understanding 101 as a Prime Number

A prime number is a whole number greater than 1 that has only two factors (divisors): 1 and itself. For example, 7 is a prime number because you can only get 7 by multiplying 1 × 7. Numbers like 4 are not prime because they can be divided by 1, 2, and 4. The number 101 fits the definition of a prime number perfectly.

How 101 Appears in Computer Codes

In the world of computers, numbers are often represented in different ways.

Binary Code and 101

Binary code is a system that uses only two symbols: 0 and 1. Computers use binary because it's easy to represent with electrical signals (on or off). When you see "101" in binary, it doesn't mean one hundred and one. Instead, it represents the number 5. Each position in a binary number has a value that is a power of 2.

• The rightmost '1' means 1 (2^0).
• The middle '0' means 0 (2^1).
• The leftmost '1' means 4 (2^2).

So, 1 + 0 + 4 equals 5.

BCD Code and 101

BCD stands for Binary-Coded Decimal. It's another way computers handle numbers. In BCD, each digit of a decimal number (0-9) is represented by its own 4-bit binary code. However, the example "101" meaning 5 in BCD is a bit misleading, as BCD usually represents each decimal digit separately. For example, the decimal number 5 would be `0101` in BCD. The sequence `101` as a whole number in BCD would be interpreted differently, usually as a series of individual digits.

Related Places and Things

• Taipei 101: This is a very tall skyscraper located in Taipei, Taiwan. It was once the tallest building in the world!