Quantitative Aptitude - Arithmetic Ability Questions

Q:

Square of (3x – 5xy) is

A) 9x2 - 30x2y + 25x2y2 B) 9x2 - 15x2y + 25x2y2
C) 25x2 - 15x2y + 9x2y2 D) 25x2 - 30x2y + 9x2y2
 
Answer & Explanation Answer: A) 9x2 - 30x2y + 25x2y2

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Filed Under: Simplification
Exam Prep: Bank Exams

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Q:

The reciprocals of the squares of the numbers 11⁄2 and 11⁄3 are in the ratio

A) 64 : 81 B) 8 : 9
C) 81 : 64 D) 9 : 8
 
Answer & Explanation Answer: A) 64 : 81

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Filed Under: Ratios and Proportions
Exam Prep: Bank Exams

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Q:

In these questions, a question is given followed by information in three statements. You have to consider the information in all the three statements and decide the information in which of the statement(s) is not necessarily required to answer the question and therefore can be dispensed with. Indicate your answer accordingly How many students from institute 'A' got placement?

I. Number of students studying in institutes A and B are in the ratio of 3:4 respectively.

II. Number of students who got placement from institute B is 120% of the number of students who got placement from institute A

III. 80% of the students studying in institute B got placement.

A) None of the statements can be dispensed with B) Only I
C) Only II D) Any one of the three
 
Answer & Explanation Answer:

Explanation:

From I No. of students studying in A and B are 3x and 4x respectively.
From II No. of students studying in B who got placement = (4x × 80) ÷ 100 = 16x/5
Hence Question cannot be answered even with the information in all the three statements
Hence option 5 is correct

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Q:

ABC inscribed in a circle so that BC is a diameter. The tangent at a point C intersects BA when produced at a point D. If ABC=36° then the value of ADC is 

A) 36° B) 44°
C) 48° D) 54°
 
Answer & Explanation Answer: D) 54°

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Q:

Of the 3 numbers whose average is 70, the first is 1/9 times the sum of other 2. The first number is

A) 32 B) 21
C) 14 D) 42
 
Answer & Explanation Answer: B) 21

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Filed Under: Problems on Numbers
Exam Prep: Bank Exams

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Q:

By increasing the price of entry ticket to a fair in the ratio 5:7, the number of visitors to the fair has decreased in the ratio 11:9. In what ratio has the total collection increased or decreased?

A) increased in the ratio 55:63 B) decreased in the ratio 63:55
C) increased in the ratio 45:77 D) decreased in the ratio 77:45
 
Answer & Explanation Answer: A) increased in the ratio 55:63

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Q:

What is the reflection of the point (-0.5, 6) in the x-axis?

A) (0.5, -6) B) (-6, -0.5)
C) (6, -0.5) D) (-0.5, -6)
 
Answer & Explanation Answer: D) (-0.5, -6)

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Filed Under: Area
Exam Prep: Bank Exams

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Q:

Find the odd word/letters/number pair from the given alternatives.

A) AEIM B) BFJN
C) CGKO D) FDKN
 
Answer & Explanation Answer: D) FDKN

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Filed Under: Odd Man Out
Exam Prep: Bank Exams

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