Question

find all possible values of Y for which the 4-digit number 64y3 is divisible by 9. Also, find the number. (please let me know the answer correctly as I have to write it in fair notebook)​

Answer 1

Answer:

first of all

we have to add all it's digit of this number

6+4+y+3 = 13+y

13+y must be the multiple of 9

:18 is the multiple of 9

so, 13+y = 18

: y = 18-13

:y = 5