Find q and r for the following pairs of positive integers a and b satisfying a=bq+r.
(1) a=13,b=3
(2) a=8,b=80
(3) a=125,b=5
(4) a=132,b=11.
1) a=13,b=3
a=bq+r
13=3×4+1
∴q=4 and r=1
2) a=8,b=80
80=8×10+0
∴q=10 and r=0
3) a=125,b=5
125=5×25+0
∴q=25 and r=0
4) a=132,b=11
132=11×12+0
∴q=12 and r=0