JEE Main Rank Booster 2021
This course will help student to be better prepared and study in the right direction for JEE Main..
₹ 13999/-
₹ 9999/-
Buy Now
Property:
If a number should be divisible by nine, then the sum of the digits must be divisible by nine.
According to the property:
2 + 1 + y + 5 = Multiples of nine
=> 8 + y = 9 (suppose, because y must be 1 digit)
therefore y= 1 only.