Quantitative Aptitude - Arithmetic Ability Questions

Q:

Which of the following is correct?

A) (4x - 5y)2 = 16x2 - 20xy + 25y2 B) (4x - 5y)2 = 16x2 + 40xy - 25y2
C) (4x - 5y)2 = 16x2  - 40xy + 25y2 D) (4x - 5y)2  = 16x2 - 20xy - 25y2
 
Answer & Explanation Answer: C) (4x - 5y)2 = 16x2  - 40xy + 25y2

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Q:

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

A) Blend B) Mingle
C) Jumble D) Clash
 
Answer & Explanation Answer: D) Clash

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Filed Under: Odd Man Out
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Q:

What is the value of Sin 30° - Cosec 45°?

A) (2√6 - 1)/√3 B) (1 - 2√3)/2
C) (√2 - √3)/√6 D) (1 - 2√2)/2
 
Answer & Explanation Answer: D) (1 - 2√2)/2

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Q:

What will be the average of the first 5 positive even numbers divisible by 9?

A) 50 B) 54
C) 48 D) 62
 
Answer & Explanation Answer: B) 54

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Filed Under: Ratios and Proportions

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Q:

If 123 x 356 = 43788, then 1.23 x 0.356 = ?

A) 437.88 B) 4.3788
C) 0.43788 D) 0.043788
 
Answer & Explanation Answer: C) 0.43788

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Q:

A root of equation ax2 + bx + c = 0 (where a, b and c are rational numbers) is 5 + 3√3. What is the value of (a2 + b2 + c2)/(a + b + c)?

A) 35/3 B) 37/3
C) – 105/11 D) – 105/13
 
Answer & Explanation Answer: C) – 105/11

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Q:

A, B and C can do job in 9, 12 and 36 days respectively if they worked alone. A leaves after they have worked together for 3 days. In how many days can B and C do the rest of the job?

A) 3 B) 4
C) 5 D) 6
 
Answer & Explanation Answer: A) 3

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Filed Under: Time and Work
Exam Prep: Bank Exams

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Q:

If a + a2 + a3  1 = 0, then what is the value of a3 + (1/a)?

A) 1 B) 4
C) 2 D) 3
 
Answer & Explanation Answer: C) 2

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