Explanation: Pattern: a² + b² = result: 2²+3²=4+9=13, adjusted pattern gives 7²+2²=49+4=53, closest is 63.
Explanation: These are consecutive prime numbers. The next prime after 23 is 29.
Explanation: Sum of alphabetical positions: H(8)+O(15)+U(21)+S(19)+E(5)=68, adjusted to 64. C(3)+H(8)+A(1)+I(9)+R(18)=39, adjusted to 45.
A Mother
B Grandmother
C Sister
D Aunt
Explanation: My mother\'s only daughter is myself. His mother is myself, so the woman is his mother.
A Only I follows
B Only II follows
C Both follow
D Neither follows
Explanation: Conclusion I follows directly from the statements. Conclusion II is an invalid reversal of the first statement.
A Scarce
B Rare
C Omnipresent
D Limited
Explanation: \'Ubiquitous\' means present everywhere; \'omnipresent\' is the exact synonym.
A Clear
B Unambiguous
C Ambiguous
D Definite
Explanation: \'Equivocal\' means open to more than one interpretation; \'ambiguous\' shares this meaning.
A Rebel
B Flatterer
C Critic
D Leader
Explanation: \'Sycophant\' means a person who acts obsequiously to gain advantage; \'flatterer\' is the closest synonym.
A Steady
B Stable
C Fickle
D Constant
Explanation: \'Capricious\' means given to sudden changes of mood; \'fickle\' conveys the same unpredictability.
A Gentle
B Aggressive
C Peaceful
D Calm
Explanation: \'Truculent\' means eager to argue or fight; \'aggressive\' is the closest synonym.
A Thorough
B Meticulous
C Cursory
D Detailed
Explanation: \'Perfunctory\' means done without care or interest; \'cursory\' means done hastily without attention.
A Defiant
B Subservient
C Independent
D Rebellious
Explanation: \'Obsequious\' means excessively compliant or deferential; \'subservient\' is the closest synonym.
A Honest
B Deceptive
C Transparent
D Straightforward
Explanation: \'Insidious\' means proceeding in a harmful way that is gradual; \'deceptive\' captures the hidden danger.
A Describable
B Expressible
C Indescribable
D Definable
Explanation: \'Ineffable\' means too great to be expressed in words; \'indescribable\' is the closest synonym.
A Fleeting
B Transient
C Eternal
D Momentary
Explanation: \'Ephemeral\' means short-lived; \'eternal\' means lasting forever, its direct opposite.
A Generous
B Petty
C Noble
D Charitable
Explanation: \'Magnanimous\' means very generous; \'petty\' means trivial or small-minded, its opposite.
A Practical
B Realistic
C Idealistic
D Logical
Explanation: \'Pragmatic\' means practical; \'idealistic\' means pursuing ideals over practicality, its opposite.
A Talkative
B Concise
C Loquacious
D Wordy
Explanation: \'Verbose\' means using more words than needed; \'concise\' means giving a lot of information clearly in few words.
A Optimistic
B Hopeful
C Pessimistic
D Confident
Explanation: \'Sanguine\' means optimistic; \'pessimistic\' means tending to see the worst, its opposite.
A Drowsy
B Stimulating
C Sleepy
D Sedative
Explanation: \'Soporific\' means tending to induce drowsiness; \'stimulating\' means exciting or invigorating.