The require value of PQ is
A line on which numbers are marked at intervals, used to illustrate simple numerical operations.
Now, given coordinates of two points on number line are
P = -41
Q = 31
Since, PQ is the distance between to points P and Q on a number line.
So, PQ is the absolute value of the sum of their coordinates P and Q.
⇒PQ = |P| + |Q|
⇒PQ = 41 + 31
⇒PQ = 72
Hence the required value PQ is 72.
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