Question

1. There are only two numbers that are twice the sum of their

individual digits. One of them 0 and I am the other one. I am a
multiple of 9. Which number am I

Answer 1

Answer: 18

Step-by-step explanation: 18=1+8=9

its complicated but when you check something like

23= 2+3 =5

10 = 1+0=1

the individual digits of 18 are 1 and 8

Sum = 1+8=9

multiply 9 by 2 we get 18

18 is also a multiple of 9.

I hope this helps