The sum of the digits of a two-digit number is seven. When the digits are reversed, the original number is increased by nine. Find the number

Question

apoorvk · Answer

okay let one's place digit be x and ten's place digit be y
then the no. is 10y+x

so, x+y=7 ....(i)

after reversal the no. becomes 10x+y

acc. to what's given,
10x+y=10y+x+9
simplifying,
or, 9x-9y=9
or, x-y=1 ....(ii)


solve equations (i) and (ii) to get x and y.

apoorvk · Answer

then ofcourse 10y+x is the no.!!

anonymous · Answer

34

apoorvk · Answer

Pikman. it helps if you dont just feed answers and can give an explanation :))

anonymous · Answer

if he needs an explanation then he would ask

anonymous · Answer

Yes true

apoorvk · Answer

ofcourse we arent just gonna feed answers. we give answers if asked not explnations! the concept is important my boy!! :)