Question

Hence, the
EXAMPLE
A two digit number is such that the product of its digits is 18. When 63 is subtracted
from the number, the digits interchange their places. Find the number.
18
MOTION Let the tens digit ber. Then, the units digits
ICRSE 2006​

Answer 1

Let the number be 10x+y

According to question,

10x+y−63=10y+x

⇒10x−x+y−10y=63

⇒9x−9y=63

⇒x−y=7

⇒x=7+y (i)

xy=18 (ii)

Substituting the value of x in (ii) we get,

(7+y)y=18

⇒y

2

+7y−18=0

⇒y

2

+9y−2y−18=0

⇒y(y+9)−2(y+9)=0

⇒(y+9)(y−2)=0

⇒y=−9 and y=2

y=−9 is not valid

∴y=2

Putting the value of y in (i) we get,

x−2=7

⇒x=7+2

⇒x=9

So the number =10x+y=10(9)+2=92

Hi aby....this is eshaa....wanted to be a friend...to u..

Answer 2

Answer:

hey brother

how have you been ?

where have you been ?

do see this answer...

I'm waiting for your reply

I've attached what i wrote...it wasn't uploading...