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Q:

The sum of 6xy(2x - 4z) , 3yz(2x - 3z) and 4xz(3y - 2y2) is

A) 12x2y - 6xyz - 9yz2 + 8xy2z B) 12x2y - 6xyz + 9yz2 - 8xy2z
C) 12x2y - 6xyz - 9yz2 - 8xy2z D) 12x2y + 6xyz - 9yz2 - 8xy2z
 
Answer & Explanation Answer: C) 12x2y - 6xyz - 9yz2 - 8xy2z

Explanation:
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Filed Under: Simplification
Exam Prep: Bank Exams

2 1764
Q:

In a sound wave compressions are regions where density _________________________

A) as well as pressure is high B) as well as pressure is low
C) is high and pressure is low D) is low and pressure is high
 
Answer & Explanation Answer: A) as well as pressure is high

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Filed Under: Physics
Exam Prep: Bank Exams

2 1764
Q:

Selling price of a table is Rs 2808. If profit percentage is 17%, then what is the cost price (in Rs) of table?

A) 2288 B) 2300
C) 2400 D) 3285
 
Answer & Explanation Answer: C) 2400

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Filed Under: Percentage
Exam Prep: Bank Exams , CAT

2 1764
Q:

If tan x = 1, 0 < x < 90, then what is the value of 2 sin x cos x?

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

Explanation:

tan x = 1

then x = 45

2sin x. cos x = 2× 1/√2 x 1/√2 = 1

an x = 1
then
x = 45
o
2sin x. cos x =
2
×
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Filed Under: Simplification
Exam Prep: Bank Exams

1 1764
Q:

Two trains are moving in the opposite directions at speed of 43 km/h and 51 km/h respectively. The time taken by the slower train to cross a man sitting in the faster train is 9 seconds. What is the length (in metres) of the slower train?

A) 235 B) 338.4
C) 470 D) 940
 
Answer & Explanation Answer: A) 235

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Filed Under: Problems on Trains
Exam Prep: Bank Exams

2 1764
Q:

Circum center of ΔABC is O. If ∡BAC = 75 and ∡BCA = 80 degrees,

 then what is the value of ∡OAC(in deg)?

A) 45 B) 65
C) 90 D) 95
 
Answer & Explanation Answer: B) 65

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Filed Under: Volume and Surface Area
Exam Prep: Bank Exams

0 1764
Q:

If the simple interest on Rs. 400 for 10 years is Rs. 280, then rate of interest per annum is

A) 7% B) 712%
C) 714% D)
 
Answer & Explanation Answer: A) 7%

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Filed Under: Percentage
Exam Prep: Bank Exams

0 1764
Q:

In the following question, a sentence has been given in Direct/Indirect speech. Out of the four alternatives suggested, select the one which best expresses the same sentence in Indirect/Direct speech.
The old man said, "Thanks I shall never forget this kindness, Ankit."

A) The old man applauded Ankit for his kindness and he shall never forget Ankit. B) The old man thanked Ankit and assured him that he would never forget his kindness.
C) Ankit was being thanked by the old man for his kindness towards an old man. D) The old man said thank you to Ankit for his kindness.
 
Answer & Explanation Answer: B) The old man thanked Ankit and assured him that he would never forget his kindness.

Explanation:
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Filed Under: English
Exam Prep: Bank Exams

1 1763