If a shopkeeper marks up goods by 40% and gives a discount of 20%, what is the net profit percentage?
A 12% B 20% C 28% D 32%
Let CP = 100. Marked price = 140. After 20% discount: SP = 140 × 0.80 = 112. Profit = 12%
A man deposited Rs. 5000 at 8% per annum compound interest. What will be the amount after 2 years?
A 5832 B 5800 C 5820 D 5900
A = P(1 + R/100)^T = 5000(1 + 100 8
If x^2 - 5x + 6 = 0, what are the values of x?
A 2, 3 B 1, 6 C -2, -3 D 2, -3
(x-2)(x-3) = 0, so x = 2 or x = 3
A number is increased by 30% and then decreased by 20%. What is the net change?
A 10% increase B 4% increase C 8% increase D 6% increase
Let number = 100. After 30% increase = 130. After 20% decrease = 130 × 0.80 = 104. Net change = 4% increase
If A : B = 2 : 3 and B : C = 4 : 5, what is A : B : C?
A 8:12:15 B 2:3:5 C 2:6:15 D 4:6:10
A:B = 2:3 (multiply by 4) = 8:12. B:C = 4:5 (multiply by 3) = 12:15. So A:B:C = 8:12:15
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Look at this series: 2, 6, 12, 20, 30, ? What comes next?
A 40 B 42 C 44 D 46
Pattern: 1×2, 2×3, 3×4, 4×5, 5×6, 6×7 = 42
A, B, C, D are four friends. A is taller than B. C is taller than D. B is taller than D. Who is the shortest?
A A B B C C D D
From statements: A > B > D and C > D. D is shorter than all others, so D is shortest
Which number should replace the question mark? 3, 5, 9, 17, 33, ?
A 65 B 67 C 70 D 68
Pattern: 3×2-1=5, 5×2-1=9, 9×2-1=17, 17×2-1=33, 33×2-1=65
If COMPUTER is coded as DPNQVUFS, how is REASONING coded?
A SFDTPOJOH B SFBTPOJOH C SFBTPOJJH D SFBTQNJOH
Each letter is shifted by +1 in alphabet. REASONING becomes SFBTPOJOH
In a code, FAST = 6-1-19-20. How would SHORT be coded?
A 19-8-15-18-20 B 19-8-15-15-20 C 20-8-15-18-20 D 19-9-15-18-20
Each letter is replaced by its position in alphabet (A=1, B=2... Z=26). SHORT = 19-8-15-18-20
Identify the error in: 'The team were playing good football yesterday.'
A were playing B good football C yesterday D No error
'Good' should be 'well' when describing how something is done (adverb usage)
In Java, which keyword is used to prevent inheritance?
A private B protected C final D static
The 'final' keyword prevents a class from being subclassed or inherited
What is the main difference between ArrayList and LinkedList in Java?
A ArrayList is faster for random access B LinkedList is faster for random access C Both have same performance D ArrayList uses more memory
ArrayList provides O(1) random access, while LinkedList provides O(n) access
In CSS, what does the 'z-index' property control?
A Font size B Text alignment C Stacking order of elements D Background color
z-index controls the stacking order of overlapping elements on a webpage
If 30% of a number is 45, what is the number?
A 100 B 120 C 150 D 180
Let number = x. 30% of x = 45. 0.30x = 45. x = 0 45
Two numbers are in the ratio 3:4. If their sum is 70, what are the numbers?
A 30, 40 B 35, 35 C 20, 50 D 25, 45
Let numbers be 3x and 4x. 3x + 4x = 70. 7x = 70. x = 10. Numbers are 30 and 40
What is the GCD of 24 and 36?
A 6 B 8 C 12 D 24
Factors of 24: 1,2,3,4,6,8,12,24. Factors of 36: 1,2,3,4,6,9,12,18,36. GCD = 12
A vendor purchases apples at Rs. 50 per dozen and sells at Rs. 5 per apple. What is the profit percentage?
A 15% B 18% C 20% D 25%
Cost per apple = 12 50 4 83
What is the time complexity of binary search algorithm?
A O(n) B O(n²) C O(log n) D O(1)
Binary search has a time complexity of O(log n) because it divides the search space by half in each iteration. This works only on sorted arrays.
A train travels from City A to City B at 60 km/h and returns from B to A at 40 km/h. If the total journey time is 10 hours, what is the distance between City A and City B?
A 240 km B 300 km C 280 km D 320 km
Let distance = d km. Time A to B = d/60 hours, Time B to A = d/40 hours. Total time: d/60 + d/40 = 10. LCM(60,40)=120, so (2d + 3d)/120 = 10, giving 5d/120 = 10, thus d = 240 km.
