The ratio between a two-digit number and the sum of the digits of that number is 4:1. If the digit at the unit's place is 3 more than the digit at the ten's place, then the number is
1). 47
2). 69
3). 36
4). 25
Check through options
Number = 36
3 + 6 = 9; 6 – 3 = 3
and 36 : 9 = 4 : 1
Otherwise– 10x + y : x + y = 4 : 1
$\Rightarrow$ 10x + (x + 3) : x + (x + 3) = 4 : 1
$\Rightarrow\frac{11x+3}{2x+3}$=$\frac{4}{1}$
$\Rightarrow$ 11x + 3 = 8x + 12
$\Rightarrow$ 3x = 9 $\Rightarrow$ x = 3 and y = 6
Then the number is 36