Question

A mobile number consists of ten digits. The first town
digits of the number one 99,8 and 7. The last three
digits are3 S and 5. The remaining digits are distinct
and make the mobile number, the greatest possible
number. What are these digits?​

Answer 1

Explanation:

A mobile number consisting of 10 digits.  

If the first four digits of number are 9,9,8 and 7 and the last three digit are 3,5 and 5.

So, 3,5,7,8,9 these 5 digits are used.

Remaining three digits are distinct, so they must be among 0,1,2,4,6, and can be used only once.

The greatest possible three digit number made by these numbers is 642

Remaining digits are is 6,4 and 2.