The irrational number which is not a surd is ...............

$\frac{p}{q}$ is a rational number and for non-negative integers $m$ and $n$,$q = 2^{m} 5^{n}$ if and only if the decimal form of $\frac{p}{q}$ is $\ldots \ldots \ldots \ldots$

State whether the following rational number has a terminating decimal expansion or not. If it has,then find it: $\frac{23}{200}$

Prove that the number $3\sqrt{2}$ is irrational.

Prove that the square of any odd positive integer is of the form $8m + 1$,where $m$ is a non-negative integer.

If $k_{1}$ and $k_{2}$ are two distinct prime integers,then their $\text{l.c.m.}$ is ..........