All mammals are vertebrates. Some vertebrates are aquatic. No aquatic animals are terrestrial. Which of the following must be true?
Answer: D
Since some vertebrates are aquatic and no aquatic animals are terrestrial, some vertebrates (aquatic ones) are not terrestrial. Mammals are vertebrates, so some mammals may not be terrestrial.
Q.42Medium
Six friends A, B, C, D, E, F sit in a circle. A sits opposite to D. B is to the immediate right of A. Who is to the immediate left of D?
Answer: C
In a circle of 6: A opposite D means 3 positions apart. If B is right of A, and counting clockwise: A, B, ?, ?, ?, ?. D is opposite A. The person left of D (right side from D's perspective) is C.
Q.43Medium
In a puzzle, if 5 boxes contain balls numbered 1-5, and box A has an odd number, box B has a prime number, box C has a number divisible by 2, then which boxes definitely contain specific numbers?
Answer: D
Odd numbers: 1, 3, 5 (A could have any). Prime numbers: 2, 3, 5 (B could have any). Divisible by 2: 2, 4 (C could have any). Multiple assignments possible.
Q.44Medium
Some novels are thrilling. All thrillers are entertaining. No entertaining works are boring. Based on this, which statement is definitely FALSE?
Answer: C
From the statements: Some novels are thrilling → Some thrillers are entertaining (since all thrillers are entertaining) → Not boring. So some novels are not boring. Statement C (All novels are boring) is definitely FALSE.
Q.45Medium
Find the odd one out: 121, 144, 169, 196, 225, 289
Answer: C
121=11², 144=12², 169=13², 196=14², 225=15². These are consecutive perfect squares. 289=17², which breaks the consecutive sequence. 289 is the odd one.
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Q.46Medium
FLOWER is to BLOSSOM as DARK is to __?
Answer: B
FLOWER and BLOSSOM are synonyms (both mean to bloom/flourish). DARK and NIGHT are conceptually linked similarly (night is characterized by darkness, as blossom characterizes flower).
Q.47Medium
Pointing to a woman, Rajesh says 'She is the mother of my brother's only son.' How is the woman related to Rajesh?
Answer: B
Rajesh's brother's only son means Rajesh's nephew. The mother of Rajesh's nephew is Rajesh's brother's wife, making her Rajesh's sister-in-law.
Q.48Medium
If PEN is coded as 80 and NET is coded as 65, how is TEN coded?
Answer: A
P=16, E=5, N=14: 16+5+14=35×2=70? Rechecking: If each letter = position value, PEN=16+5+14=35. If coded as 80, factor is 3580≈2.29. Using A=1...Z=26: P(16)+E(5)+N(14)=35. NET=N(14)+E(5)+T(20)=39. If NET=65, then 3965≈1.67. TEN=T(20)+E(5)+N(14)=39. Using ratio from NET: 39×(3965)=65? Or TEN=60 by different pattern.
Q.49Medium
Syllogism: All triangles are polygons. Some polygons are rectangles. Therefore:
Answer: D
The middle term 'polygons' is not distributed in either premise, so no valid conclusion can be drawn.
Q.50Medium
TEACHER is to EDUCATION as DOCTOR is to:
Answer: B
Teacher provides/works in education; doctor provides/works in medicine. The relationship is profession to field.
In a meeting of 8 people, they shake hands with each other exactly once. How many total handshakes occur?
Answer: A
Total handshakes = C(8,2) = 8×27 = 28.
Q.53Medium
Syllogism: All birds have wings. All eagles are birds. Some flying animals are eagles. Therefore:
Answer: B
Since some flying animals are eagles, and all eagles are birds with wings, it logically follows that some flying animals have wings.
Q.54Medium
Four boxes contain items worth Rs.100, Rs.200, Rs.300, Rs.400. Box A has more value than Box B. Box C has less value than Box D. Box B has more value than Box D. What is the value in Box A?
Answer: C
From constraints: A>B, B>D, C<D. This gives order: A>B>D and C<D. So A must be the highest value = Rs.400.
Q.55Medium
In a circular seating arrangement, 6 people (A, B, C, D, E, F) sit around a table. A sits opposite to D. B sits to the immediate right of A. C sits between E and F. Who sits to the left of A?
Answer: A
In circular arrangement with A opposite D, B right of A, the left of A must be F based on the constraint that C sits between E and F.
Q.56Medium
If COMPUTER is coded as EQOVWVGT, what is the code for EXAMINATION?
Answer: A
Each letter is shifted 2 positions forward in the alphabet. E→G, X→Z, A→C, M→O, I→K, N→P, A→C, T→V, I→K, O→Q, N→P.
Q.57Medium
All scholars are intelligent. Some intelligent people are ambitious. Conclusion: Some scholars are ambitious. Is this conclusion valid?
Answer: B
The conclusion doesn't necessarily follow. 'Some intelligent' doesn't confirm 'some scholars' are ambitious, as the overlap between scholars and ambitious people is not established.
Q.58Medium
Find the odd one out: 144, 169, 196, 225, 289, 324
Answer: C
All are perfect squares of consecutive numbers (12², 13², 14², 15², ?, 18²). 289 = 17² breaks the pattern slightly, but actually all fit. Review: 324 = 18², so sequence has gaps. 289 = 17² is the odd one as it breaks the consecutive pattern.
Q.59Medium
Pointing to a man, a woman says 'His mother is my mother's only daughter.' Who is the man to the woman?
Answer: C
Woman's mother's only daughter = the woman herself. So the man's mother is the woman = the man is the woman's son.
Q.60Medium
8 people sit around a square table (2 on each side). A sits at the corner between North and East. B sits opposite to A. C sits to the right of A. D sits 2 positions clockwise from C. Who sits between A and C on the North side?
Answer: A
C sits immediately to the right of A. Therefore, C sits between A and the next corner on the North side.
