The root "ped" means related to legs, walking, or feet. A “biped” is a two-legged animal. The prefix ­"bi_-" means related to the number two. So, to solve this analogy, you have to determine how many legs a “quadruped” has. The correct answer is “four,” because the prefix ­"quad-_" means related to the number four.

The prefix "in_-" means into and the prefix "ex-_" means out of. So, to “inhale” is to breathe in and to “exhale” is to breathe out. To solve this analogy, you need to identify the answer choice that is the opposite of “implicit.” “Implicit” means understood without having to be directly said, so the best antonym is “explicit,” which means obviously stated. None of the other answer choices are antonyms of "implicit": “implied” means suggested but not directly stated, so it is a synonym of implicit; "extraneous" means extra and not necessary; and “extrapolate” is a verb that means take certain information and reach some conclusion about it; and "interesting" means able to hold one's attention or fascinating.

One would expect to be able to get books from a library, so to solve this analogy, you need to pick out an answer choice that is an object you would expect to be able to get from a bakery. You might expect to be able to get bakery from a bakery, so "bread" is the correct answer. None of the other answers make sense in the blank as something you might expect to get from a bakery; while you might expect to find an oven and a kitchen in a bakery, you wouldn't expect to be able to take these things with you like books from a library, so those answer choices are incorrect.

A “century” is one hundred consecutive years, so to solve this analogy, you have to determine how many years a “millennium” is. The correct answer is a "thousand.” The prefix "cent_-" means hundred, and likewise, the prefix "mil-"_ means thousand. Just think of "centipedes" and "millipedes" if you think you might get these confused. The key here is not to be confused by the fact that "millennium" does not refer to a span of a "million" years, despite "million" also beginning with "mil-."

The prefixes "in-," "im-," and "dis_-"_ are all negationprefixes. This means they take the original meaning of the word and cause it to mean the opposite. “Credulous” means believing, naïve, gullible, so “incredulous” must mean disbelieving, skeptical, doubtful. To solve this analogy, you have to determine which of these answer choices is the opposite of “credit,” which means to give recognition for some achievement. The correct antonym is “discredit,” which means harm the reputation of, prove wrong. To provide further help, “dismantle” means to take apart; “innate” means natural, inherent; “impossible” means not possible.

A “diameter” is a line running through the center of a circle from one side to the other. A “radius” is half the diameter, so to solve this analogy you have to determine which answer choice means half a circle. The correct answer is “semicircle.” The prefix "semi-" means half and the prefix "dia-" means through, across, over. To provide further help, the “circumference” is the length around the outside of a circle; a “sphere” is a three-dimensional circle; “parallel” means running alongside, having the same slope; “perpendicular” means running on opposite slopes and is the opposite of "parallel."

The prefix "un-" means not. "Unreal" means not real, or "fake," so "unreal" and "fake" are synonyms because they have the same meaning. To solve the analogy, you need to pick out an answer choice that means the same thing as "uncertain." "Uncertain" means not certain or unknown, so "unknown" is the correct answer.

The suffix "-archy" means ruling, so in a “patriarchy,” the people are ruled by a man or a group of men. In a "matriarchy," the people are ruled by a woman or a group of women.

The prefix non- negates the meaning of the word that comes after it, so “nonsense” is opposite in meaning to “sense.” Likewise the prefix un- serves a similar purpose, so someone who is “friendly” is opposite to someone who is “unfriendly.” The key to answering this question is to know which prefix is appropriate to use in this individual case. To provide further help, amiable means friendly and sociable.

The prefix "mono­_-_" means related to the number one, and the prefix "poly-" means related to more than one or related to many. In this instance, that information would be enough for you to solve this problem. However, further clarification will be helpful for other problems. A “monosyllabic” word is a word that has one syllable, and a "polysyllabic" word is a word that has more than one syllable. So, "red" and "blue" are each monosyllabic words, and "yellow" and "color" are each polysyllabic words.