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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

Shrenik switched on a bulb at 2 : 39 : 40 hours and switched it off on the same day at 12 : 30 : 34 hours. For how long was the bulb in switched-on mode?

A) 9 hours 9 minutes 6 sec B) 12 hours 40 minutes 6 sec
C) 9 hours 50 minutes 54 sec D) 10 hours 9 minutes 6 sec
 
Answer & Explanation Answer: C) 9 hours 50 minutes 54 sec

Explanation:
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Filed Under: Time and Distance
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Q:

A bag contains coins of denominations Rs.1, Rs.5 and Rs.10. Assuming there are equal number of Rs.1, Rs.5 and Rs.10, what will be the total number of coins in the bag be if the total money is Rs. 368?

A) 69 B) 96
C) 56 D) 65
 
Answer & Explanation Answer: A) 69

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Filed Under: Simplification
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Q:

If a3+1a3 = 2, then the value of a2+1a?

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

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Q:

ΔABC is right angled at B. If m ∠A = 60°, then what is the value of 1/√3 Cosec C?

A) 2/√3 B) 2/3
C) √2/√3 D) √2/3
 
Answer & Explanation Answer: A) 2/√3

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Q:

In the following question, select the odd letter/letters from the given alternatives.

A) BE B) SU
C) AD D) OR
 
Answer & Explanation Answer: B) SU

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Filed Under: Odd Man Out
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Q:

Given that the polynomial (x2+ ax+ b) leaves that same remainder when by (x –1) or (x + 1) What are the values of a and b respectively?

A) 4 and 0 B) 0 and 3
C) 3 and 0 D)  0 and any interger
 
Answer & Explanation Answer: D)  0 and any interger

Explanation:

Since x^2+ ax + b when divided by x-1 or x+1 leaves the same remainder

So on putting x=1 and x=-1 we get the same value

1+a+b = 1-a+b

2a=0

a=0

here b can take any value as it will always get cancelled out

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Filed Under: Numbers
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Q:

If a - b = 3 and a2+b2=25, then the value of ab is

A) 16 B) 8
C) 10 D) 15
 
Answer & Explanation Answer: B) 8

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Q:

Breadth of a rectangle is equal to the diagonal of the square whose side is 2.5√2 cm. Ratio between length and breadth of rectangle is 3 : 1. Find the area of the rectangle (in cm2).

A) 75 B) 90
C) 85 D) 80
 
Answer & Explanation Answer: A) 75

Explanation:

Diagonal of Square = Side √2= 2.5√2 × √2= 5 cm
Breadth = 5 cm
Length of rectangle = 5 × 3 = 15 cm
Area of rectangle = 15 × 5 = 75 cm2

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

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