Quantitative Aptitude - Arithmetic Ability Questions

Q:

The average age of 24 students is 12 years. It was observed that while calculating the average age, the age of a student was taken as 14 years instead of 8 years. What will be the correct average age (in years)?

A) 11.25 B) 11.5
C) 11.75 D) 12.25
 
Answer & Explanation Answer: C) 11.75

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Filed Under: Average
Exam Prep: Bank Exams

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Q:

A, B and C invest in a business in the ratio 4 : 5 : 7. C is a sleeping partner, so his share of profits will be half of what it would have been if he were a working partner. If they make Rs 36,000 profit of which 25% is reinvested in the business, how much does B get (in Rs)?

A) 7560 B) 10800
C) 8640 D) 9200
 
Answer & Explanation Answer: B) 10800

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Filed Under: Partnership
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Q:

Flight A usually takes 1 hour more than Flight B to travel a distance of 7200 km. Due to engine trouble speed of flight B falls by a factor of 1/6th, so it takes 36 minutes more than Flight A to complete the same journey? What is the speed of Flight A (in km/hr)?

A) 800 B) 900
C) 750 D) 720
 
Answer & Explanation Answer: A) 800

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Filed Under: Time and Distance
Exam Prep: Bank Exams

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Q:

Ram lent Rs. 6,000/- to Shiva for 3 years and Rs. 8,000/- to Krishna for 5 years at the same rate of simple interest per annum. He got a total interest of Rs. 5,220 from both. Find the rate of interest per annum.

A) 6% B) 7%
C) 8% D) 9%
 
Answer & Explanation Answer: D) 9%

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Filed Under: Simple Interest
Exam Prep: Bank Exams

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Q:

What approximate value should come at the place of question mark (?) in the following questions (You are not expected to calculate the exact value).

(111.93 × 5) ÷ 14.02 = 11.002 + ?

A) 11 B) 10
C) 29 D) 34
 
Answer & Explanation Answer: C) 29

Explanation:

Ans.
112 × 5 ÷ 14 = 11 + ?
112 × 5 ÷ 14 = 11 + ?
560 ÷ 14 = 11 + ?
40 = 11 + ?
? = 40 - 11 = 29

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Filed Under: Simplification
Exam Prep: AIEEE , Bank Exams , GATE

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Q:

If a3 + b3 = 28 and a + b = 4, then what is the value of ab?

A) -3 B) 2
C) 8 D) 3
 
Answer & Explanation Answer: D) 3

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Q:

If Sin x = 4/5, then Cosec x + Cot x =

A) 31/12 B) 35/12
C) 2 D) 1/2
 
Answer & Explanation Answer: C) 2

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Q:

The compound interest earned in two years at 12% per annum is Rs 10176. What is the sum (in Rs) invested?

A) 50000 B) 60000
C) 40000 D) 80000
 
Answer & Explanation Answer: C) 40000

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Filed Under: Compound Interest
Exam Prep: Bank Exams

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