Question

Fill in the blanks using sign $>,<\text{or}=$

$\text{XXX \_\_\_\_}31$

Answer 1

In the Hindu-Arabic numbers,

We know that

$\text{XXX}=\left(10+10+10\right)=30$

Now,

$$\begin{gathered} \Rightarrow 30<31 \\ \therefore \text{XXX}<31 \end{gathered}$$