Question

Find the product of $125\times 25\times 8\times 4$ by suitable rearrangement

Answer 1

Finding the product:

Using associative property for rearrangement, after rearranging, we get,

$\begin{array}{rcl}125\times 25\times 8\times 4& =& (125\times 8)\times (25\times 4)\\ & =& 1000\times 100(\mathrm{using}\mathrm{BODMAS}\mathrm{rule})\\ & =& 100000\end{array}$

Hence, the product is $100000$.