1.

A nine digit number abcdefghtis such that a is divisible by 1, ab is divisible by 3 and abcd is divisible by 4 and so on where none of a, b, c, d, … is same andevery digit is a non-zero digitsuch a number is :

Answer»

123456789
381654729
126453789
826435791

Answer :B


Discussion

No Comment Found