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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

2cos[(C+D)/2]sin[(C-D)/2] is equal to

A) sinC + sinD B) sinC - sinD
C) cosC - cosD D) cosC + cosD
 
Answer & Explanation Answer: B) sinC - sinD

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Filed Under: Simplification
Exam Prep: Bank Exams

1 1866
Q:

A book is sold at three successive discounts of 20%, 20% and 10%. What is the net discount (in percentage)?

A) 42.4 B) 48.6
C) 44.2 D) 40.4
 
Answer & Explanation Answer: A) 42.4

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Filed Under: Percentage
Exam Prep: Bank Exams

3 1866
Q:

Diameter of a car wheel is 21 cm. A car driver moving at the speed of 66 km/hr takes 36 seconds to reach a destination. How many revolutions will the wheel make during the journey?

 

 

A) 1800   B) 1500
C) 1200   D) 1000
 
Answer & Explanation Answer: D) 1000

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Filed Under: Time and Distance
Exam Prep: Bank Exams

7 1866
Q:

In an examination, 52% candidates failed in English and 42% failed in Mathematics. If 17% failed in both the subjects, then what percent passed in both the subjects?

 

A) 77 B) 58
C) 48 D) 23
 
Answer & Explanation Answer: D) 23

Explanation:

No of students failed in English only = 52 –17 = 35

No of students failed in maths only = 42 –17 = 25

Total no of failed students in either of the subjects = 35+17+25 = 77

No of passed student in both subjects = 100 –77 = 23

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Filed Under: Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams

0 1865
Q:

The effective annual rate of interest corresponding to a nominal rate of 15% per annum payable half-yearly is

A) 15.56 percent B) 30 percent
C) 31.13 percent D) 15 percent
 
Answer & Explanation Answer: A) 15.56 percent

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Filed Under: Simple Interest
Exam Prep: Bank Exams

2 1865
Q:

A boat travels 24 km upstream in 6 h and 20 km downstream in 4 h. then, the speed of a boat in still water and the speed of current are respectively

A) 4.5 km/h and 3 km/h B) 4.5 km/h and 0.5 km/h
C) 4 km/h and 2 km/h 5 km/h and 2 km/h D) 5 km/h and 2 km/h
 
Answer & Explanation Answer: B) 4.5 km/h and 0.5 km/h

Explanation:

Distance travelled by boat in upstream=24km

Time taken = 6 h

Speed of the boat in upstream = 24/6 = 4 km/h

And distance travelled by boat in downstream = 20 km

Time taken = 4h Speed of the boat in downstream = 20/4 km/h = 5 km/h

Now, speed of the boat in still water = 1/2 [ speed of the boat in upstream + speed of the boat in downstream] =1/2 [4 + 5] = 1/2 × 9 = 4.5 km/h

And speed of the current = 1⁄2 [speed of the boat in downstream – speed of the boat in upstream] = 1/2 [5 – 4] = 1/2 × 1 = 0.5 km/h

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Filed Under: Boats and Streams
Exam Prep: Bank Exams

7 1865
Q:

The area of a rhombus having one side 10 cm and one diagonal 12 cm is

A) 48 cm2 B) 96 cm2
C) 144 cm2 D) 192 cm2
 
Answer & Explanation Answer: B) 96 cm2

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Filed Under: Area
Exam Prep: Bank Exams

0 1865
Q:

2*[­0.3(1.3 + 3.7)] of 0.8 = ?

A) ­1.92 B) -0.72
C) 2.16 D) -­2.4
 
Answer & Explanation Answer: D) -­2.4

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Filed Under: Simplification
Exam Prep: Bank Exams

0 1864