Question

Hi frnds ..
A password is a 5 digit number. the fourth digit is 4 more than the second one the third digit is 3 less than second one .the first digit is three times the fifth digit .3 pairs of digit sum upto 11 what is the password ?

Answer 1

Let first digit be 'X' then 5th digit is '3X' 
Let 2nd digit be 'Y' then 3rd digit is 'Y-3' and 4th digit is 'Y+4' 
then the number is '(X)(Y)(Y-3)(Y+4)(3X)' 
From the above we can say 3X<=9 so X<=3 and any of the digit in the number is 
<=9 and also given that 3 pairs sum is 11... 
so make trial and error.. 
If X=1...any of the number is 10 which is wrong trial.... 
If X=2...then let Y+4=9 ==> Y=5 then number is 25296 
First pair 2+9=11 
Second pair 2+9=11 
Third pair 5+6=11 
Now the answer is 25296