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 Quantitative Aptitude - Arithmetic Ability Questions

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Q:

The mean of marks secured by 45 students in division A of class X is 56, 40 students of division B is 52 and that of 40 students of division C is 50. Find the mean of marks of the students of three divisions of Class X.

A) 52.1 B) 51.4
C) 52.8 D) 54.2
 
Answer & Explanation Answer: C) 52.8

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Q:

If tanθ = 815, then 1-sinθ1+sinθ is

A) 1/5 B) 2/5
C) 3/5 D) 0
 
Answer & Explanation Answer: C) 3/5

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Q:

In the following question, four groups of three numbers are given. In each group the second and third number are related to the first number by a Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

A) (17, 84, 35) B) (12, 59, 23)
C) (7, 34, 13) D) (11, 54, 21)
 
Answer & Explanation Answer: A) (17, 84, 35)

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Q:

In the following question, four groups of three numbers are given. In each group the second and third number are related to the first number by a Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

 

A) (113, 109, 105) B) (142, 137, 133)
C) (197, 193, 189) D) (162, 158, 154)
 
Answer & Explanation Answer: B) (142, 137, 133)

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Q:

If 3x + 4(1-x) > 5x -2 > 3x - 4; then the value of x is

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

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Q:

What value of 'p' will satisfy the equation p540 = 240p ?

A) 6 B) 10
C) 6√10 D) √10
 
Answer & Explanation Answer: C) 6√10

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Q:

ΔGHI is similar to ΔKLM. If the ratio of Perimeter of Δ GHI : Perimeter of ΔKLM = 1:4, and length of GH is 2 cm, what is the length of the corresponding side KL?

A) 4 cm B) 8 cm
C) 32 cm D) 16 cm
 
Answer & Explanation Answer: B) 8 cm

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Q:

The sum of two numbers is equal to thrice their difference. If the smaller of the numbers is 10 find the other number.

A) 15 B) 30
C) 40 D) None of these
 
Answer & Explanation Answer: D) None of these

Explanation:

Let larger number be x and smaller number be y.

Also, y = 10

According to question,

⇒(x + y) = 3((x –y)⇒(x + 10) = 3(x –10)

⇒2x = 40⇒x = 20

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