Question

# The reciprocal of 15 is ___.A.15B.$\dfrac{{15}}{1}$C.$\dfrac{1}{{15}}$D.1

Hint: If a be any number then $a \times$(reciprocal of a) = 1, so reciprocal of a is $\dfrac{1}{{\text{a}}}$.
i.e. If a is any number then $\dfrac{1}{a}$ is the reciprocal of a.
Also we know that $a \times \dfrac{1}{a} = 1$, i.e. (any number) $\times$ (the reciprocal of this number) = 1
Therefore the reciprocal of 15 is $\dfrac{1}{{15}}$.