23
Q:

If a+b=5 and 3a+2b=20,then (3a+b)will be :

 

A) 20 B) 15
C) 25 D) 30

Answer:   C) 25



Explanation:

a+b=5   ...(1)    and    3a+2b=20 ...(2)

 

Multiplying (1) by 2 and subtracting from (2), we get : a=10.

 

Putting a=10 in (1), we get : b=-5

 

Therefore,   (3a+b) = 3 x 10+(-5)=30-5=25.

Subject: Simplification
Exam Prep: CAT
Job Role: Bank Clerk
Q:

If  1515151515....... and x > 0, then find the value of x2 + 4.

 

A) 125 B) 179
C) 200 D) 229
 
Answer & Explanation Answer: D) 229

Explanation:
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0 3197
Q:

If 2560.256 = 25.6x, then what will be the value of x?

A) 2.56 B) 25.6
C) 0.256 D) 0.0256
 
Answer & Explanation Answer: D) 0.0256

Explanation:
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0 357
Q:

Find the unit place digit in the expression (159)144 + (114)123 - (110)510 + (213)25

 

A) 3 B) 4
C) 7 D) 8
 
Answer & Explanation Answer: D) 8

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0 4251
Q:

If (x + 1x) = 2, then find the value of (x3 + 1x3) ÷ (x18 + 1x18)

 

A) 2/9 B) 5
C) 1 D) 1/9
 
Answer & Explanation Answer: C) 1

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0 5034
Q:

The two roots of an quadratic equation are given as x = 2/3 and x = -1/2. The equation can be written as

A) (2x - 1) (3x + 2) = 0 B) (2x + 1) (3x + 2) = 0
C) (2x + 1) (3x - 2) = 0 D) (2x - 1) (3x - 2) = 0
 
Answer & Explanation Answer: D) (2x - 1) (3x - 2) = 0

Explanation:
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Exam Prep: Bank Exams

1 331
Q:

If x2 + ax + b, when divided by x - 4, leaves a remainder of 32 and x2 + bx +a, when divided by x - 4, leaves a remainder of 35, then a + b = ?

 

A) -7 B) 23
C) 7   D) -23
 
Answer & Explanation Answer: D) -23

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0 316
Q:

Find the degree of the polynomial 8x4 + 2x2y3 + 4

A) 4 B) 5
C) 0 D) 1
 
Answer & Explanation Answer: B) 5

Explanation:
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6 744
Q:

Find the products : 0.5 x 0.05 x 0.005 x 500

A) 0.0625 B) 0.00625
C) 0.06255 D) 0.625
 
Answer & Explanation Answer: A) 0.0625

Explanation:
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1 658