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Q.51 Medium Amazon Questions Amazon

Which option follows the logical pattern? 2-4-6, 3-6-9, 4-8-12, 5-?-?

A 10-15

B 10-20

C 15-20

D 10-25

Correct Answer: A. 10-15

EXPLANATION

Pattern: Each set is n, 2n, 3n. For 5, it should be 5, 10, 15

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Q.52 Medium Amazon Questions Amazon

If all birds can fly and all eagles are birds, then all eagles can fly. This is an example of which type of reasoning?

A Inductive reasoning

B Deductive reasoning

C Abductive reasoning

D Analogical reasoning

Correct Answer: B. Deductive reasoning

EXPLANATION

This follows a logical structure (syllogism) from general premise to specific conclusion, which is deductive reasoning.

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Q.53 Medium Amazon Questions Amazon

Two persons A and B invest Rs. 2000 and Rs. 3000 respectively in a business. If the profit is Rs. 5000, how much profit does A get?

A Rs. 2000

B Rs. 2500

C Rs. 3000

D Rs. 3500

Correct Answer: A. Rs. 2000

EXPLANATION

Ratio = 2000:3000 = 2:3. A's share = (2/5) × 5000 = Rs. 2000

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Q.54 Medium Amazon Questions Amazon

In a class, 60% students passed in Math, 70% passed in Science, and 50% passed in both. What percentage of students failed in both subjects?

A 10%

B 15%

C 20%

D 25%

Correct Answer: C. 20%

EXPLANATION

Passed in at least one = 60 + 70 - 50 = 80%. Failed in both = 100 - 80 = 20%

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Q.55 Medium Amazon Questions Amazon

If (a + b)² = 64 and ab = 15, what is a² + b²?

A 32

B 34

C 36

D 38

Correct Answer: B. 34

EXPLANATION

(a + b)² = a² + 2ab + b². 64 = a² + b² + 30. a² + b² = 34

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Q.56 Medium Amazon Questions Amazon

A man's age is 3 times his son's age. After 10 years, his age will be 2 times his son's age. What is the son's current age?

A 8 years

B 10 years

C 12 years

D 15 years

Correct Answer: B. 10 years

EXPLANATION

Let son's age = x. Man's age = 3x. After 10 years: 3x + 10 = 2(x + 10). 3x + 10 = 2x + 20. x = 10

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Q.57 Medium Amazon Questions Amazon

If a sequence is 2, 5, 10, 17, 26, what is the next number?

A 35

B 37

C 39

D 41

Correct Answer: B. 37

EXPLANATION

Differences: 3, 5, 7, 9... next difference is 11. So 26 + 11 = 37

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Q.58 Medium Amazon Questions Amazon

A shopkeeper marks up goods by 50% and gives a discount of 20%. What is his profit percentage?

A 20%

B 25%

C 30%

D 35%

Correct Answer: A. 20%

EXPLANATION

Let CP = 100. Marked Price = 150. After 20% discount: SP = 150 × 0.8 = 120. Profit = 20%

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Q.59 Medium Amazon Questions Amazon

Two pipes A and B can fill a tank in 12 hours and 18 hours respectively. If both pipes are opened together, how long will it take to fill the tank?

A 6.5 hours

B 7.2 hours

C 8.5 hours

D 9 hours

Correct Answer: B. 7.2 hours

EXPLANATION

Rate of A = 1/12 per hour. Rate of B = 1/18 per hour. Combined rate = 1/12 + 1/18 = 3/36 + 2/36 = 5/36. Time = 36/5 = 7.2 hours

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Q.60 Medium Cognizant Questions Cognizant

If a car travels at 60 km/h for 2 hours and 40 km/h for 3 hours, what is the average speed?

A 48 km/h

B 50 km/h

C 52 km/h

D 54 km/h

Correct Answer: A. 48 km/h

EXPLANATION

Total distance = 60×2 + 40×3 = 120 + 120 = 240 km. Total time = 2 + 3 = 5 hours. Average = 240/5 = 48 km/h

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