### How do you calculate the fifth square of a number?

There's no such thing as "the fifth square" of a number. To calculate any whole-number power of a number, write the number that many times all on one line, then write the word "times" between them, get your pencil out, and get to work. The 5th power of a number 'N' is 'N' times 'N' times 'N' times 'N' times 'N' .

### When you write down from 50 to 100 how many times will 10 occur?

This is a very ambiguous question. First, by "writing down from 50 to 100" I presume you mean writing down all the whole numbers from 50 to 100 inclusive, that is, including 50 and including 100. Now, if by "how many times will 10 occur" you mean how many of those numbers will be multiples of 10, the answer is 6. If you mean how many times will the 2 digits 1 and 0 occur…