Aptitude and Reasoning Questions

Q:

If sum of the roots of a quadratic equation is ­-7 and product of the roots is 12. Find the quadratic equation.

A) x2 + 7x + 12 = 0 B) x2 -­ 7x + 12 = 0
C) x2 -­ 7x -­ 12 = 0 D) x2 + 7x -­ 12 = 0
 
Answer & Explanation Answer: A) x2 + 7x + 12 = 0

Explanation:
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Q:

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

A) Nokia B) Whirlpool
C) Apple D) Micromax
 
Answer & Explanation Answer: B) Whirlpool

Explanation:
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Q:

If Cot θ = 21/20, then what is the value of Cosec θ?

A) 21/29 B) 29/21
C) 20/29 D) 29/20
 
Answer & Explanation Answer: D) 29/20

Explanation:
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Q:

A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.

L, N, Q, S, V, ?

A) W B) Y
C) Z D) X
 
Answer & Explanation Answer: D) X

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Filed Under: Alphabet Test
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Q:

A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.

-7/4, -1, -0.25, ? , 5/4, 2

A) 0.5 B) 0.75
C) 0.25 D) 1
 
Answer & Explanation Answer: A) 0.5

Explanation:
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Q:

What should be added to 5(2x-y) to obtain 4(2x - 3y) + 5(x + 4y)?

A) 3x - 13y B) 3x + 13y
C) 13x - 3y D) 13x + 3y
 
Answer & Explanation Answer: B) 3x + 13y

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Q:

A man walks 3 km West, then turns South and walks 7 km, then turns East and walks 3 km, then turns to his right and walks 5 km. Where is he now with reference to her starting position?

A) 12 km North B) 2 km South
C) 12 km South D) 2 km North
 
Answer & Explanation Answer: C) 12 km South

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Filed Under: Direction Sense Test
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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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