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The region F,f represents "People that are all three: Americans, Women, and with Blonde hairs." This is because F represents the intersection of Americans and Women, and f represents the intersection of Women and people with Blonde hairs. Therefore, the overlapping region F,f represents the intersection of all three categories: Americans, Women, and people with Blonde hairs.

The given series consists of odd numbers starting from 1, with the exception of 8. Therefore, 8 does not belong to the series.

By rearranging the letters "PAJAN", we can form the word "JAPAN". Japan is a country, not an ocean, city, or animal.

Whales are not fishes. They are mammals. Unlike fishes, whales are warm-blooded, give live birth, and nurse their young with milk. They also have lungs and breathe air, while fishes have gills and extract oxygen from water. Therefore, the statement "The whales are fishes" is false.

The word "Mason" is the odd one out because it does not belong to the category of professions that require specialized training or education. While a doctor, economist, and artist all require specific knowledge and skills in their respective fields, being a mason typically involves more hands-on training and experience rather than formal education.

There are 24 hours in a day and 60 minutes in an hour, so there are 24 x 60 = 1440 minutes in a day. Since there are 60 seconds in a minute, there are 1440 x 60 = 86400 seconds in a day. Therefore, the correct answer is 86400.

The average man has only one birthday. This is because a birthday refers to the day a person was born, and each person only has one birthdate. The options provided in the question are irrelevant and do not affect the number of birthdays a person has.

Triangles and wheels are both geometric shapes, while fruits and apples are both types of food. The analogy here is that just as triangles and wheels are related in the context of shapes, apples and fruits are related in the context of food. Therefore, the correct answer is Apples.

A tetrahedron is a solid shape that has four triangular faces, six edges, and four vertices. It is a three-dimensional figure that resembles a pyramid with a triangular base. The other options, pyramid, cone, and cylinder, do not have the same characteristics as a tetrahedron. A pyramid has a polygonal base and triangular faces, but it can have more than four faces. A cone has a circular base and a curved surface, while a cylinder has two circular bases and a curved surface. Therefore, the correct answer is tetrahedron.

The figure in question is called an ellipse. An ellipse is a closed curve that is symmetric about its center. It is defined as the set of all points in a plane such that the sum of the distances from any point on the curve to two fixed points (called foci) is constant. The term "ellipse" can be written in both lowercase and uppercase letters.

The word "Cat" is least like the other three because it is the only living creature among the options, while "Knife," "Freedom," and "Tree" are all non-living objects or concepts.