Question

The ratio between a two digit number and the sum of digits of that number is 4 :1 if the dihit in tje unit place is 3 more than the dihit in tje tenth place qhat is that number

Answer 1

let the 2 digit number be 10a + b (i.e the number ab) 
so from the first relationship we can see that 10a+b=4(a+b) 
and from the second, b=a+3 
substituting the second into the first: 
10a+a+3=4(a+a+3)=11a+3=8a+12, 3a=9, a=3 (looking back at the equations), b=6 
so the number is 36