Reasoning is the one section where practice changes your score fastest, because the question types repeat even when the surface changes. Topics include number and letter series, coding and decoding, blood relations, direction sense, syllogism, seating arrangement, puzzles, and statement based questions. Solutions show the diagram or table used to reach the answer, which is the part worth copying into your own method.
Seven students P, Q, R, S, T, U, V stand in a line. T is 4th from left. P is 2 positions to the left of T. V is 2nd from right. Q is between P and S. Where is R?
Answer: A
T at 4, P at 2, V at 6 (2nd from right in 7). Q between P(2) and S: possibly 3. Remaining: R at 5 or 7. V at 6 means R at 5 or 7. Given Q between P and S, arrangement: P-Q-S-T-?-V-R gives R at 6, or P-Q-S-T-R-V-U gives R at 5. Correcting: R at position 6.
Q.83Medium
All doctors are intelligent. Some intelligent people are rich. Conclusion: Some doctors are rich. Is this conclusion valid?
Answer: B
Doctors are intelligent, but not necessarily among the 'some intelligent people who are rich.' The conclusion is logically invalid.
In a logic puzzle, 6 boxes are arranged left to right. Red box is 3 positions from left. Green is 2 right of Yellow. Blue is immediate left of Red. If there are only 4 colors, where is Yellow?
Answer: A
Red at 3, Blue at 2. Green 2 right of Yellow: if Yellow at 1, Green at 3. But Red at 3. If Yellow at 4, Green at 6. This works: Blue(2), Red(3), Yellow(4), Green(6). Yellow at position 4... Rechecking: Yellow could be at 1 if Green at 3, but Red there. So Yellow at 4.
Q.86Medium
In a certain code language, MATHEMATICS is written as LZSGZLJBHRD. How is SCIENCE written in that code?
Answer: B
Each letter is shifted backward by 1 position in the alphabet. S→R, C→B, I→H, E→D, N→M, C→B, E→D. The pattern gives RDHNCBD.
Q.87Easy
If A is the brother of B, C is the daughter of B, D is the brother of C, then what is the relationship between A and D?
Answer: A
A is brother of B, so B is A's sibling. C is daughter of B (A's sibling), and D is brother of C. Therefore, D is the child of B (A's sibling), making A the uncle of D.
Q.88Easy
In a class of 40 students, some play cricket, some play football, and some play both. If 25 play cricket and 20 play football, how many play both?
Answer: B
Using set theory: Total = Cricket + Football - Both. 40 = 25 + 20 - Both. Both = 45 - 40 = 5.
Q.89Medium
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.90Easy
A person walks 10 km north, then 5 km east, then 10 km south, then 5 km west. Where does he end up?
Answer: A
Walking 10 km N, then 10 km S cancels out vertically. Walking 5 km E, then 5 km W cancels out horizontally. The person returns to the starting point.
Q.91Easy
In a row of 8 people sitting left to right, P is 5th from the left. How many people are to the right of P?
Answer: B
If P is 5th from the left in a row of 8, then positions 6, 7, 8 are to the right. That's 3 people.
Q.92Easy
ELEPHANT : TRUNK :: KANGAROO : ?
Answer: A
As trunk is a distinctive feature/characteristic of elephant, pouch is a distinctive feature of kangaroo. The analogy is based on unique features.
Q.93Medium
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.94Easy
Complete the series: Z, Y, X, W, V, U, __, __
Answer: A
The series is in reverse alphabetical order, decreasing by 1 each time. After U comes T, then S.
Q.95Medium
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.96Easy
If CATS is coded as 3-1-20-19, then DOGS is coded as?
Answer: A
Each letter is replaced by its position in the alphabet: C=3, A=1, T=20, S=19. Similarly: D=4, O=15, G=7, S=19. Answer: 4-15-7-19.
Q.97Hard
In a seating arrangement, 6 people sit around a hexagonal table. M is 2 seats away from N (clockwise). K is opposite to M. Who sits between K and N (clockwise)?
Answer: B
We know M, N (2 seats away clockwise), and K (opposite M). But without knowing other people's positions or exact starting point, the person between K and N cannot be uniquely determined.
Q.98Medium
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.99Medium
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.
Q.100Easy
In a race, Arjun finishes before Bhavna, and Bhavna finishes before Chaya. Devi finishes before Arjun. Who finishes last?
