You can convert 1000 to hex and see how many digits that requires:

So every integer below 1000 needs up to 3 digits.
Alternatively, we know that

, and that

requires

digits in its hex representation (e.g.

). Taking the logarithm, we get

, and adding 1 gives the number of digits needed to represent

. Similarly,
If its (1/5)^4
625-3x=625
-3x=0
x=0
If its 1/5^4 then the answer is 390624/1975
I'm betting its (1/5)^4
Order of operations matters
Answer:
25
Step-by-step explanation:
maybe this will help you