Question

what is the number written on the upper right of another number which means the number of times that the base will be multiplied by itself

Answer 1

The number written on the upper right of another number is called the index.

Index is also called the power or exponent.

$a^3 \: \text{is read as 'a to the power 3'}\\ \\ a^3 = a \times a \times a \:$