Final answer:
To make 11 using three fours, we can use addition, subtraction, multiplication, or division to combine and manipulate the numbers. However, when using only addition, it is not possible to make 11.
Step-by-step explanation:
To make 11 using three fours, we can use the following equation: 4 + 4 + 4 = 12. This is not equal to 11, so it is not possible to make 11 using three fours. However, if we allow the use of other operations such as addition, subtraction, multiplication, or division, we can come up with different solutions. For example, (4 + 4) - 4 = 8 - 4 = 4, or (4 x 4) - 4 = 16 - 4 = 12. These solutions all result in numbers other than 11.