Question

161What number goes to the whole part​

Answer 1

You can only find an approximation for x, if x² = 161.

the condition that x² > 161 only forces x >=13 so it can possibly be 26355124423.

If x²=161 there are only two candidates for x: 12 and 13.

12²= 144

13²=169

because the distance between 161 and 169 is only 8 while the distance between 144 and 161 is 17, the better approximation is 13