Please explain question i dont get the question

#1

Please explain question i dont get the question

#2

@k.bhupenderagile,
You are given n and k.
Find the greatest integer x, such that, x^k <= n
Sample Input:
2
10000 1
1000000000000000 10
first case:
Here n = 10000 and k = 1;
Find x such that x^(1) <= 10000

second case:
Here n= 1000000000000000 and k = 10;
Find x such that x^(10) <=1000000000000000