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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

Three friends J, K and L jog around a circular stadium and complete one round in 12, 18 and 20 seconds respectively. In how many minutes will all the three meet again at the starting point.

A) 5 B) 8
C) 12 D) 3
 
Answer & Explanation Answer: D) 3

Explanation:

All the three friends will meet at the starting point again after X seconds, such that X is the LCM of the times taken by J, K and L to complete one round.

=> LCM of 12, 18 and 20 = 180 seconds = 3 minutes.

Hence 3 minutes is the answer.

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Filed Under: HCF and LCM

1 2035
Q:

A parallelogram PQRS, the length of whose sides are 8 cm and 12 cm, has one diagonal 10 cm long Ile length of the other diagonal is approximately:

A) 17.8 cm B) 17.5 cm
C) 17 cm D) 18 cm
 
Answer & Explanation Answer: A) 17.8 cm

Explanation:
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Filed Under: Area

10 2035
Q:

If the radius of a circle is increased by 14% its area increases by

A) 28 percent B) 29.96 percent
C) 14 percent D) 14.98 percent
 
Answer & Explanation Answer: B) 29.96 percent

Explanation:
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Filed Under: Area
Exam Prep: Bank Exams

1 2034
Q:

Every month, Kritika spends 30% of her income on house rent and 60% of the rest on household expenditure. If she saves ₹ 6300 per month, what is her total monthly income?

A) ₹ 22,000 B) ₹ 20,500
C) ₹ 22,500 D) ₹ 25,000
 
Answer & Explanation Answer: C) ₹ 22,500

Explanation:

Let the monthly income be x
Kritika spends 30% of her income on house rent. The remaining amount will be 70% of x
Kritika spends 60% of the rest (70% of 60% = 42% of x )on household expenditure. The remaining amount will be 28% of x
If 28% of x is 6300 then 100% will be 22,500

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Filed Under: Percentage
Exam Prep: AIEEE , Bank Exams , CAT

0 2034
Q:

A man spend 7.5% of his money and after spending 75% of the remaining, he had Rs. 370 left. How much money did he have

A) 1200 B) 1600
C) 1500 D) 1400
 
Answer & Explanation Answer: B) 1600

Explanation:
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Filed Under: Percentage
Exam Prep: Bank Exams

3 2034
Q:

(secA ­- tanA)/(cosecA + cotA) is equal to

A) (secA -­ cotA) / (cosecA + tanA) B) (secA -­ cosA) / (cosecA + sinA)
C) (cosecA -­ cotA) / (secA + tanA) D) (secA + cosA) / (cosecA -­ sinA)
 
Answer & Explanation Answer: C) (cosecA -­ cotA) / (secA + tanA)

Explanation:
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Filed Under: Simplification
Exam Prep: Bank Exams

0 2034
Q:

The average of 25 consecutive odd integers is 55. The highest of these integers is

A) 79 B) 105
C) 155 D) 109
 
Answer & Explanation Answer: A) 79

Explanation:
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Filed Under: Problems on Numbers
Exam Prep: Bank Exams

6 2034
Q:

In how many different ways can the letters of the word 'THERAPY' be arranged so that the vowels always come together?

A) 720 B) 1440
C) 1800 D) 3600
 
Answer & Explanation Answer: B) 1440

Explanation:

Given word is THERAPY.

Number of letters in the given word = 7

Number of vowels in the given word = 2 = A & E

Required number of different ways, the letters of the word THERAPY arranged such that vowels always come together is

6! x 2! = 720 x 2 = 1440.

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Filed Under: Permutations and Combinations
Exam Prep: AIEEE , Bank Exams , CAT , GATE
Job Role: Analyst , Bank Clerk , Bank PO

13 2033