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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

There were 24 studentsina class. One of them, who was 18 years old, left the class and his place was filled up by a new comer.Ifthe average of the class was thereby lowered by 1 month, the age of new comer is-

A) 14 years B) 15 years
C) 16 years D) 17years
 
Answer & Explanation Answer: C) 16 years

Explanation:

Let the age of new comer be x

Avg age decrease by 1/12 year ⇒24 X 1/12 = 18 –x

⇒x=16 years

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Filed Under: Problems on Ages
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Q:

The ratio of present ages of Anil and Aakash is 4 : 5. Three years later their ages will be in ratio 7 : 8. What is the present age (in years) of Anil?

A) 8 B) 6
C) 4 D) 10
 
Answer & Explanation Answer: C) 4

Explanation:
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Q:

199994 x 200006 = ?

A) 39999799964 B) 39999999864
C) 39999999954 D) 39999999964
 
Answer & Explanation Answer: D) 39999999964

Explanation:
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Q:

In these tests find the Odd figure out

A) a B) b
C) c D) d
 
Answer & Explanation Answer: B) b

Explanation:
In option B shaded circle is common of all three circles but in others the shaded circle is the common part of only two circles.
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Q:

What is the area (in sq cm) of an equilateral triangle of side 6 cm?

A) 36√3 B) 9
C) 36 D) 9√3
 
Answer & Explanation Answer: D) 9√3

Explanation:
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Q:

Point P is the midpoint of segment AB. Co-ordinates of P are (3 , 1) and B are (5, -4). What are the co-ordinates of point A?

A) (-1 , 7) B) (1 , -7)
C) (1 , 6) D) (-1 , -7)
 
Answer & Explanation Answer: C) (1 , 6)

Explanation:
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Q:

[sinA/(1 + cosA)] + [(1 + cosA)/sinA] is equal to

A) 2secA B) 2cosecA
C) 2tanA D) 2cotA
 
Answer & Explanation Answer: B) 2cosecA

Explanation:
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Q:

The value of Cot17°Cot73°Cos222° + 1Cot17°Sec268° is

A) 0 B) 1
C) 2 D) √3
 
Answer & Explanation Answer: B) 1

Explanation:
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