Question

25. There are only 2 numbers that are twice the sum of their individual digits; one of them is zero (0). What is the other one?

Answer 1

Answer:

Step-by-step explanation:

Let digits be x , y

Let the number be 10x+y

sum of digits will be x+y

10x+y = 2(x+y)

10x+y = 2x+2y

8x = y

Substituting x = 1

x = 1 , y = 8

Therefore the number is 18