Question

When a number is multiplied with 25 gives 78125. Find the number and express it as a power of 5. [3 MARKS]

Answer 1

Concept : 1 Mark
Application : 1 Mark
Calculation : 1 Mark

Let the number be $x$

Given that,

$\left(x\right)\times \left(25\right)=78125$

$x=3125$

$\Rightarrow$ The required number is 3125

Now,

$3125=5\times 5\times 5\times 5\times 5$

$\Rightarrow 3125=5^5$