The following statement are not true

change one word in each statement to make it true
write only the word
1. The Penny Farthing had a front wheel that was much smaller than the back wheel.
2. A coach is a vehicle that is pulled by oxygen.
3. Caravels had square sail.

1. The Penny Farthing had a front wheel that was much larger than the back wheel.

2. A coach is a vehicle that is propelled by oxygen.
3. Caravels had triangular sail.

The following statement are not true

change one word in each statement to make it true
write only the word
1. The Penny Farthing had a front wheel that was much smaller than the back wheel.
2. A coach is a vehicle that is pulled by oxen.
3. Caravels had square sail.

The following statement are not true

change one word in each statement to make it true
write only the word
1. The Penny Farthing had a front wheel that was much larger than the back wheel.
2. A coach is a vehicle that is pulled by horses.
3. Caravels had triangular sail.

To change one word in each statement to make them true, you can follow these steps:

1. The original statement is: "The Penny Farthing had a front wheel that was much smaller than the back wheel."
To make it true, you can change the word "smaller" to "larger."
Revised statement: "The Penny Farthing had a front wheel that was much larger than the back wheel."

2. The original statement is: "A coach is a vehicle that is pulled by oxygen."
To make it true, you can change the word "oxygen" to "horses."
Revised statement: "A coach is a vehicle that is pulled by horses."

3. The original statement is: "Caravels had square sail."
To make it true, you can change the word "square" to "triangular."
Revised statement: "Caravels had triangular sails."

By altering just one word in each statement, you can make them all true.