Count the number of vehicles with 1, 2, 4, and 10 wheels based on the provided images. (This question is inferred from the solution provided)

Here are the answers to your homework:

a) To find how many vehicles have one wheel, we look at the pictures.

• There is one unicycle.
• The unicycle has one wheel. There is $\boxed{\text{1}}$ vehicle with one wheel.

b) To find how many vehicles have two wheels, we look at the pictures.

• There are three bicycles.
• Each bicycle has two wheels. There are $\boxed{\text{3}}$ vehicles with two wheels.

c) To find how many vehicles have four wheels, we look at the pictures.

• There is one blue car.
• There is one yellow car.
• There is one red car.
• Each car has four wheels. There are $\boxed{\text{3}}$ vehicles with four wheels.

d) To find how many vehicles have ten wheels, we look at the pictures.

• There is one truck.
• The truck has ten wheels (four on the front part and six on the back trailer part). There is $\boxed{\text{1}}$ vehicle with ten wheels.