GPSC preparation needs Gujarat specific material that general study guides skip. Practice covers Gujarat history, geography and culture, Indian polity and constitution, economy, general science, and current affairs relevant to the state. Each explanation adds the surrounding detail rather than a single line, which helps when the same subject reappears in the mains paper.
Which number should replace the question mark? 2, 6, 12, 20, 30, ?, 56
Answer: B
The pattern is n(n+1): 1×2=2, 2×3=6, 3×4=12, 4×5=20, 5×6=30, 6×7=42, 7×8=56.
Q.2Medium
Four friends A, B, C, and D are sitting in a line. B is not at the end. C is between A and D. Who is sitting second?
Answer: B
Since C is between A and D, the arrangement must be A-C-D or D-C-A. B cannot be at the end, so B must be in position 2. Arrangements: A-B-C-D or D-C-B-A, but C must be between A and D. Only A-C-D arrangement works with B in position 2: This doesn't work. Actually: D-C-A-B or A-C-D-B or similar. C is definitely in a middle position.
Q.3Medium
If all roses are flowers, and some flowers are red, then which statement is necessarily true?
Answer: D
We cannot determine if roses are red from the given statements. Roses are flowers, but only 'some' flowers are red, not all. Therefore, we cannot make a definitive statement about roses being red.
Q.4Medium
A clock shows 3:00. The hour hand and minute hand form an angle of how many degrees?
Answer: B
At 3:00, the minute hand points to 12 and the hour hand points to 3. The angle between them is 90°.
Q.5Medium
In a sequence: 1, 1, 2, 3, 5, 8, 13, ?, what is the next number?
Answer: B
This is the Fibonacci sequence where each number is the sum of the previous two. 8 + 13 = 21.
Q.6Medium
A rectangular box has dimensions 5 × 4 × 3 cm. How many 1 cm cubes can fit inside it?
Answer: C
Volume of box = 5 × 4 × 3 = 60 cubic cm. Volume of each 1 cm cube = 1 cubic cm. Number of cubes = 60.
Q.7Medium
If x : y = 3 : 4 and y : z = 8 : 9, then x : y : z is:
Answer: B
x : y = 3 : 4 and y : z = 8 : 9. To make y the same in both, multiply first by 2: x : y = 6 : 8. So x : y : z = 6 : 8 : 9.
Q.8Medium
If a man can complete a job in 12 days, what fraction of the job can he complete in 3 days?
Answer: B
Work completed per day = 121. Work completed in 3 days = 3 × (121) = 123 = 41.
Q.9Medium
A container has 10 red balls and 15 blue balls. If one ball is drawn randomly, what is the probability of drawing a red ball?
Answer: A
Total balls = 10 + 15 = 25. Probability of red ball = 2510 = 52.
Q.10Medium
If a clock shows 3:15, what is the angle between the hour hand and minute hand?
Answer: A
At 3:15, minute hand is at 3 (90°). Hour hand moves 30° per hour + 0.5° per minute = 90° + 7.5° = 97.5°. Angle = 97.5° - 90° = 7.5°
Q.11Medium
Find the odd one out: 121, 144, 169, 196, 225, 256
Answer: D
All others are perfect squares of consecutive integers (11², 12², 13², 14², 15²). 256 = 16², breaking the consecutive pattern.
Q.12Medium
In a family, A's father's father is B's father. What is A's relationship to B?
Answer: A
B's father = A's grandfather. Therefore A is B's grandson.
Q.13Medium
Complete the series: 2, 6, 12, 20, 30, 42, ?
Answer: B
Pattern: 1×2, 2×3, 3×4, 4×5, 5×6, 6×7, 7×8 = 56
Q.14Medium
P, Q, R, S, T are sitting in a row. If P is to the left of Q, R is to the right of S, and T is to the right of R, which of the following could be true?
Answer: B
Check constraints: P<Q ✓, S<R ✓, R<T ✓. Only option B satisfies all conditions.
Q.15Medium
In a logic puzzle, A + B = 15, B + C = 17, C + A = 18. What is A + B + C?
Answer: B
Adding all three: 2(A+B+C) = 50, so A+B+C = 25
Q.16Medium
Which number is missing in the pattern: 8, 24, 72, 216, 648, ?, 5832
Answer: A
Each number is multiplied by 3: 8×3=24, 24×3=72, 72×3=216, 216×3=648, 648×3=1944
Q.17Medium
If 5 men can build a wall in 12 days, how many men are needed to build it in 3 days?
Answer: B
Work remains constant: 5 × 12 = X × 3. Therefore X = 360 = 20 men
Q.18Medium
A boat travels 30 km downstream in 2 hours and upstream in 3 hours. What is the speed of the current?
Answer: A
Downstream speed = 15 km/h, Upstream speed = 10 km/h. Current speed = (15-10)/2 = 2.5 km/h
Q.19Medium
If a dice is thrown twice, what is the probability of getting a sum of 7?
Answer: A
Favorable outcomes: (1,6), (2,5), (3,4), (4,3), (5,2), (6,1) = 6. Total outcomes = 36. Probability = 366 = 61
Q.20Medium
If TRIANGLE is written as USJBOHF in a certain code, how is SQUARE written?
Answer: A
Each letter is shifted forward by 1 position in the alphabet. S→T, Q→R, U→V, A→B, R→S, E→F.
