Generally, when we ask someone for his or her WhatsApp number, they readily give it. But this fellow is a bit adamant. He gives 9 clues to find out the 10-digit number. A super interesting mathematical puzzle indeed!
It is a good intellectual treat for mathematics junkies. Try if you can. Apply both the sides of your brain.
        



    If you are able to solve it within 20 minutes, 5 stars
                                to you! One star less every 20 minutes thereafter......frown


 1. This number starts with an odd digit and ends with an even digit with a difference of 3 between the two.

 2. You won't find any odd digit in this number which is a perfect square root of a digit or any even digit which is a perfect square.

 3. The neighboring digit of the first and the last digit is the same and junior to both of them.

 4. No single digit is repeated thrice

 5. No single digit is repeated successively except one

 6. The 8th digit is greater than the 7th and smaller than the 9th

 7. 5th digit - 6th digit = 4th digit

 8. 2nd digit + 3rd digit = last digit

 9. This 10-digit number is greater than 7999999999 

    There are three possible answers to this quiz ...Write your answer in the comments below...