Question

In a two digit number the ten's digit is twice unit's digit. If 27 is added to the number the digits interchange their places. Find the number​

Answer 1

Answer:

Step-by-step explanation:Let units digit be x

thus, tens digit=2x

thus the no stands as 10(2x)+x=20x+x=21x

ATP,

on adding 27 to the no, digits get reversed hence,

units digit =2x

tens digit=x

thus , new no=10x+2x=12x

therefore 21x+27=12x

=> 9x=27

=>x=3

the no is thus (10*2*3)+2=62 -ANS

Answer 2

Answer:

let the unit digit =2x

tens digit=x

Original no. = x *10+2x

Reversed no. =2x*10 +x

According to the condition,

27 + x*10 +2x=2x*10 +x

27+12x=21x

27=9x

x=3

2x=6

SO NUMBER IS 36