Question

In a three digit number the tens digit is the average of
the other two digits. The ratio of the number formed
by its first two digits and their sum equals the ratio of
the number formed by its last two digits and their sum.
How many three digit numbers satisfy these
conditions?
(A) 7
(B) 8
(C) 9
(D) 6​

Answer 1

Answer:

answer is

Step-by-step explanation:

3+2+2+2=9

Total answer is (C) 9

Answer 2

I don't know if this is the right way, probably not. but I found that three nos are prepotional. There for could identify 9 such combinations. Hence by eleminating all other options it must be 9 or more combination and highest option is 9.

in case you are wondering what my 9th combination was, it's 421.