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Q:

The sum of the two digits of a number is 8. If the number is subtracted from the number obtained by reversing its digits, the result is 54. Find the number ?

A) 28	B) 19
C) 37	D) 17

Answer & Explanation Answer: D) 17

Explanation:

Any two digit number can be written as (10P + Q), where P is the digit in the tens place and Q is the digit in the units place.
P + Q = 8 ----- (1)
(10Q + P) - (10P + Q) = 54
9(Q - P) = 54
(Q - P) = 6 ----- (2)
Solve (1) and (2) P = 1 and Q = 7
The required number is = 17

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Filed Under: Problems on Numbers
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Q:

" Rani ki Vav " an archaeological attraction is located in which of the following states ?

A) Andhra Pradesh	B) Telangana
C) Rajasthan	D) Gujarat

Answer & Explanation Answer: D) Gujarat

Explanation:

Rani ki Vav meaning the Queen’s Stepwell is an archaeological site in the state of Gujarat. Beauitfully structured, the site has been included in the list of international heritage sites by UNESCO. With the help of the ambitious project, The Scottish Ten, Rani ki Vav is among the five heritage sites that would be recreated digitally for managment and conservation.

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Filed Under: Famous Places
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Q:

What should come in place of the question mark(?) in the following questions ?

$3 \frac{1}{6} + 4 \frac{1}{2} - 2 \frac{2}{3} - 1 \frac{11}{12} = ?$

A) 1 7/12	B) 1 5/12
C) 3 7/12	D) 3 1/12

Answer & Explanation Answer: D) 3 1/12

Explanation:

? = (3 + 4 - 2 - 1) + ( 1/6 + 1/2 - 2/3 - 11/12)

= 4 + [(2+6-8-11)/12]

= 4 - (11/12 )= 31/12.

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Filed Under: Mathematical Operations
Exam Prep: CAT , Bank Exams , AIEEE
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Q:

Which is the subset of SQL commands used to manipulate Oracle Database structures, including tables ?

A) Data Manipulation Language(DML)	B) Data Definition Language(DDL)
C) Both A & B	D) None

Answer & Explanation Answer: B) Data Definition Language(DDL)

Explanation:

The Data Definition Language (DDL) is used to manage table and index structure.

CREATE,

ALTER,

RENAME,

DROP and

TRUNCATE

statements are the names of few data definition elements.

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Filed Under: SQL
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Q:

A user type a content on 20 sheets, each sheet consist of 55 lines, and each line can have 66 characters. The content is again retyped on another set of sheets, these new sheets have 65 lines and each line can take 70 characters. Calculate the reduction in sheets ?

A) 2 or 60%	B) 4 or 20%
C) 6 or 10%	D) 8 or 5%

Answer & Explanation Answer: B) 4 or 20%

Explanation:

20 x 55 x 66 = L x 65 x 70
Here L = 72,600/4550 = 15.95 =~ 16
Reduction is 20-16 = 4

which is 20% reduction.

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Filed Under: Percentage
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Q:

A contractor undertook to complete a piece of work in 120 Days and employed 140 men upon it. At the end of 66 days only half of the work was done,so he put on 25 extra men. By how much time did he exceed the specific time ?

A) 2 days	B) 3 days
C) 4 days	D) 5 days

Answer & Explanation Answer: A) 2 days

Explanation:

work done=total number of person x number of days;
half of work done = 140 x 66;
For half of remaining work 25 extra men are added.
Therefore, total men for half work remaining = 140 + 25 = 165;
Let 2nd half work will be completed in K days;
140 x 66 = 165 x K
K = 122;
Hence, extra days => 122-120 = 2days.

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Filed Under: Time and Work
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Q:

If Reena’s age was twice of her present age, when subtracted from four times three years from hence, with three times the three years before her present age. What will be her age after one year ?

A) 22 yrs	B) 21 yrs
C) 20 yrs	D) 24 yrs

Answer & Explanation Answer: A) 22 yrs

Explanation:

Let Reena’s present age be 'K' yrs.
Given:{(K+3) x 4} - {(K-3) x 3)}
=> K = 21 yrs
So her present age is 21 yrs.
Then, her age after 1 year is 22 yrs.

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Filed Under: Problems on Ages
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Q:

If 6 years are subtracted from the present age of Arun and the remainder is divided by 18, then the present age of his grandson Gokul is obtained. If Gokul is 2 years younger to Madan whose age is 5 years, then what is the age of Arun ?

A) 72 years	B) 54 years
C) 60 years	D) 47 years

Answer & Explanation Answer: C) 60 years

Explanation:

Let the Present age of arun is x
Gokul's age = 5-2 = 3
x-6/18 = 3
x-6 = 54
x = 60
Arun's present age = 60 years

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Filed Under: Problems on Ages
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