Question

A three digit number is given whose no two digits are same and every digit is non zero. if there are total N four digit numbers which will produce this number if one digit is crossed out then find N.​

Answer 1

Answer:

Step-by-step explanation:

Ans is 6

suppose 3 digit number is 123

so possible 4 digit numbers may be 1234,1235,1236,1237,1238,1239

if we cut last digit we get 123 in each case. So total such numbers are six

Ans N = 6