What is a sum of squares? Simply explained

Everyone has probably heard the term “sum of digits” – but many people have forgotten exactly what a sum of digits is since their school days. We will enlighten you

Cross sum: What exactly is it?

• The checksum is the sum of the individual digits of a multi-digit number.

• Example: The sum of the digits of 251 is 8, since 2 + 5 + 1 = 8.

• A sum of digits can only be formed from natural numbers. The number must therefore be greater than zero and must not contain a decimal place.