in a 2 digit number the unit place digit is twice the tens place digit if 27 is added to the number the digits interchange their place. What is the number?
Answers
Answered by
2
let the ones digit x and tens digit be y
original no = 10 y + x
a/q to question
y = 2x........... (i)
..........10 y +x +.27 = 10x +.y
10 y -y +x -10x = -27
9y -9x = -27
9 (y -x) = 27
(y -x) = 3.......(ii)
y -.x = 3......(putting value of y = 2x)
2x - x = 3
x = 3
y =2x
y = 2 *3 = 6
number = 10 *6 +3
63
original no = 10 y + x
a/q to question
y = 2x........... (i)
..........10 y +x +.27 = 10x +.y
10 y -y +x -10x = -27
9y -9x = -27
9 (y -x) = 27
(y -x) = 3.......(ii)
y -.x = 3......(putting value of y = 2x)
2x - x = 3
x = 3
y =2x
y = 2 *3 = 6
number = 10 *6 +3
63
Similar questions