I WILL MARK BTAINPY IF YOU ANSWERthe sum of digits of a 2 digit number

1.	I WILL MARK BTAINPY IF YOU ANSWERthe sum of digits of a 2 digit number less than 20 is 5 find the number and the number formed by reversing its digits
Answer» Step-by-step EXPLANATION: Answer:let the two digits of a two digit NUMBER be X and Y. Then the two digit number so formed is (10x+y),where X is at 10's place and Y is at unit place. By question, 4 (X+y)=(10x+y)-18............(1) And 4(X+y)=(10y+X)-9..............(2) From above two equations we have, 10x+y-18=10y+x-9 Or,9x-9y-9=0 Or,x-y-1=0 Or,X=(1+y) Using this VALUE of X in (1) we get 4(1+y+y)=10(1+y)+y-18 Or,4+8y=10+11y-18 Or,12=3y Therefore,y=4 Now X=(1+y)=1+4=5 Now REQUIRED product of digits is Xy=54= 20 hope it helps !!!!!

I WILL MARK BTAINPY IF YOU ANSWERthe sum of digits of a 2 digit number less than 20 is 5 find the number and the number formed by reversing its digits

Answer»

Step-by-step EXPLANATION:

Answer:let the two digits of a two digit NUMBER be X and Y.

Then the two digit number so formed is (10x+y),where X is at 10's place and Y is at unit place.

By question,

4 (X+y)=(10x+y)-18............(1)

And

4(X+y)=(10y+X)-9..............(2)

From above two equations we have,

10x+y-18=10y+x-9

Or,9x-9y-9=0

Or,x-y-1=0

Or,X=(1+y)

Using this VALUE of X in (1) we get

4(1+y+y)=10(1+y)+y-18

Or,4+8y=10+11y-18

Or,12=3y

Therefore,y=4

Now X=(1+y)=1+4=5

Now REQUIRED product of digits is

X*y=5*4= 20

hope it helps !!!!!