Question 1111392
A number between 20 and 30 and is three times the sum of its digits. What is the number?

Let the number be 10x+y

but x=2
the number is 20+y
(20+y) = 3(2+y)
20+y = 6+3y
2y=14
y=7
the number is 27

check
27= 3(2+7)