Q. 1 D5.0( 3 Votes )

# If is a 3-digit number, thenis always divisible byA. 12B. 15C. 18D. 21

Let us collect numbers and their reversal.

Take for instance, , then its reversal is .

We know, in its general form can be written as,

And in its general form can be written as,

Taking their difference, we get

…(i)

Now, take . Expanding each in general form, we get

Then, we get

…(ii)

Adding equations (i) and (ii), we get

n = 18 (a – c)

We can easily say that, n is divisible by 18.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Quiz | Who will Win the Game?41 mins
Quiz on Divisibility Test32 mins
Mastering Divisibility Test42 mins
Divisible or not41 mins
Quiz | Imp. Qs. on Playing With Numbers45 mins
Properties of Rational Numbers29 mins
Quiz | Properties of Rational Numbers41 mins
Together With | Understanding Secularism53 mins
On the Number line44 mins
Essentials of Rational Numbers45 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses
RELATED QUESTIONS :

Computers use

Karnataka Board - Mathematics Part I

If is a 3-digit number, then

is always divisible by

Karnataka Board - Mathematics Part I

The general form of 456 is

Karnataka Board - Mathematics Part I

If is a 3-digit number, then the number

is always divisible by

Karnataka Board - Mathematics Part I