Question

in two digits number, digit in the ones place is twice the digit in the tens place ,if 27 is added to it, digits are reversed find the number

Answer 1

the final answer is 63...at beginning it is 36

Answer 2

let the 2 digit number be xy
according to the first condition
y=2x
according to 2nd condition
xy+27=yx
10x+y+27=10y+x
9x-9y+27=0
x-y+3=0
x-2x+3=0
x=3

y=2x
y=6

the number is 36