Question

what is the biggest number that can be written with four ones

Answer 1

Step-by-step explanation:

There are several way of writing 1 four times. But here we need to know that what are the circumstances under which we are asked to do so.

If we can not use any operation and need to use digits only , then there are infinite ways of doing it. Since, there will be infinite combination of digits which involve four 1's

But if we are allowed to use operations then, the largest number that we can achieve by using 1 four times is

11 raised to the power 11, which will be equal to 2.8 x10^11

Answer 2

$\tt \orange{ \boxed{ \boxed{ {11}^{11} }}}$

Hope my answer will help you.