For homework, Juan's teacher asked everyone in the class, to write down the different types of transportation (cars, trucks, bicycles, skateboards etc) they saw on their way home that afternoon.  After school, Juan walked home and saw the following: 15 cars, 3 bicycles, 8 pickup trucks and 1 tricycle.  How many tires in total were there on the vehicles Juan saw?
He saw 15 cars and 8 trucks so 15+8 = <<15+8=23>>23 vehicles
Those 23 vehicles have 4 wheels each so 23*4 = <<23*4=92>>92 wheels
Bicycles have 2 wheels each and he saw 3 bikes so 2*3 = <<2*3=6>>6 wheels
Tricycles have 3 wheels each and he saw 1 tricycle so 1*3 = <<1*3=3>>3 wheels
In total, Juan saw 92 + 6 + 3 = <<92+6+3=101>>101 wheels
#### 101