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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

A, B, C started a business with their investments in the ratio 1:3 :5. After 4 months, A invested the same amount as before and B as well as C withdrew half of their investments. The ratio of their profits at the end of the year is :

A) 1 : 2 : 3 B) 3 : 4 : 15
C) 3 : 5 : 10 D) 5 : 6 : 10
 
Answer & Explanation Answer: D) 5 : 6 : 10

Explanation:

Let their initial investments be x, 3x and 5x respectively. Then,

 

A:B:C = (x*4+2x*8) : (3x*4+(3x/2)*8) : (5x*4+(5x/2)*8)

 

20x : 24x : 40x = 5 : 6 : 10          

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207 86450
Q:

Find the next number in the following number series?

410, 409, 413, 404, ? 

A) 412 B) 415
C) 418 D) 420
 
Answer & Explanation Answer: D) 420

Explanation:

The given number series 410, 409, 413, 404, ? , follows a pattern that 

410

410 - 13 = 409409 + 22 = 413413 - 33 = 404404 + 42 = 420

 

Hence, the next number in the given series is 420.

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Exam Prep: AIEEE , Bank Exams , CAT , GATE
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4 86382
Q:

Solve the following :

 

196 - 19.6 - 1.96 - 0.196 = ?

 

A) 173.254 B) 173.234
C) 174.234 D) 174.244
 
Answer & Explanation Answer: D) 174.244

Explanation:
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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

 A pupil's marks were wrongly entered as 83 instead of 63. Due to that the average marks for the class got increased by half. The number of pupils in the class is :

A) 45 B) 40
C) 39 D) 37
 
Answer & Explanation Answer: B) 40

Explanation:

Let there be x pupils in the class.

Total increase in marks = (x * 1/2) = x/2.

x/2 = (83 - 63) => x/2 = 20 => x = 40.

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201 84906
Q:

The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero ?

A) 0 B) -1
C) 1 D) none of these
 
Answer & Explanation Answer: A) 0

Explanation:

Average of 20 numbers = 0. 

 

Sum of 20 numbers = (0 * 20) = 0. 

 

It is quite possible that 19 of these numbers may be positive and if their sum is a, then 20th number is (- a).

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279 84798
Q:

Direction: What should come in the place of question mark (?) in the following number series?

7, 10, 16, 28, ?, 100

A) 34 B) 40
C) 52 D) 60
 
Answer & Explanation Answer: C) 52

Explanation:

The pattern followed is +3 , +6 , +12 , +24 , +48

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Filed Under: Numbers
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0 84777
Q:

The length of a diagonal in cms of a rectangle of length 5 cm and width 3 cm is

 

A) √34 B) +-√34
C) 4 D) +-4
 
Answer & Explanation Answer: A) √34

Explanation:
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Filed Under: Area
Exam Prep: Bank Exams

2 84601
Q:

Direction: What value should come in place of the question mark (?) in the following question?

534.596 + 61.472 - 496.708 = ? + 27.271

A) 126.631  B) 62.069
C) 72.089 D) 132.788
 
Answer & Explanation Answer: C) 72.089

Explanation:

534.596 + 61.472 – 496.708 = ? + 27.271

596.068 – 496.708 = ? + 27.271

? = 99.36 – 27.271

? = 72.089.

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