The index of a number is the same as its power or exponent.

In the expression 2^3, the number 2 is called the base.

The expression 5^0 equals 5.

The square root of 49 is an index of 2.

An index of 3 in the expression 4^3 means 4 is used as a factor three times.

The cube of a number is the same as raising it to the power of 2.

In the expression 7^2, 7 is the exponent.

The index of a square number is always 4.

If 10^1 equals 10, then 10^10 equals 10 times itself ten times.

An index of 1 indicates that the number remains unchanged.