The odd one out is November, as it is the only month in the list with 30 days. The others (March, May, and June) have 31 days.

The odd one out is Cherry, as it is the only fruit that grows on a tree with a pit. The others (Apple, Banana, and Orange) have a different structure and do not have pits in the same way.

The odd one out is Circle, as it is the only shape that does not have straight sides. The others (Square, Triangle, Rectangle) all have straight edges.

The odd one out is Whale, as it is the only animal in the list that lives primarily in water. The others (Elephant, Dog, and Tiger) are land-dwelling mammals.

The odd one out is E, as it is the only letter in the list that is a vowel. The others (B, D, and F) are consonants.

The odd one out is 16, as it is the only number in the list that is a power of 2 (2⁴). The others (12, 14, and 18) are not powers of 2.

The odd one out is Snakes and Ladders, as it is a board game based purely on chance, while the others (Chess, Checkers, and Go) are strategy-based games.

The odd one out is Mountain, as it is a landform, while the others (Ocean, River, and Lake) are bodies of water.

The odd one out is Brother, as it is the only relationship that does not have a generational distinction. The others (Father, Uncle, and Grandpa) indicate different generations in a family.

The odd one out is Mother, as it refers to a parental role, while the others (Wife, Husband, Sister) represent non-parental, marital, or sibling roles.