We have that point P represents the largest integer value that is less than a square root of 223:
The integer is 14. Then P=14.
Let point Q represent the largest integer value that is less than a square root of 68. Then:
The integer is 8. Then q=8.
The distance between P and Q is given by:
P-Q= 14-8= 6
Hence, the distance is given by 6 units.