n^(1/2)^(1/2) (square root is the number raised to the 1/2 power)
And the rule for exponents with exponents is:
a^b^c=a^(b*c) in this case:
n^(1/4)
so we are told that
n^(1/4)=11 raise both sides to the fourth power
n=11^4
n=14641
check...
√14641=121
√121=11
correct :D