There are 20 bicycles, 10 cars and 5 motorcycles in the garage at Connor's house. How many wheels are there in the garage?
The number of bicycle wheels is 2 × 20 = 40.
The number of car wheels is 4 × 10 = 40.
The number of motorcycle wheels is 2 × 5 = 10.
There are 40 + 40 + 10 = 90 wheels in the garage.